Baker, D.G., Skaggs, R.H., and Ruschy, D.L. (1991). Snow Depth
Required to Mask the Underlying Surface, Journal of Applied
Meteorology, Vol. 30, pp. 387-392.

Baker, D.G., Ruschy, D.L., and Wall, D.B. (1990). The Albedo Decay of
Prairie Snows,Journal of Applied Meteorology, Vol. 29, pp. 179-187.

Barry, S.A. (1978), Errors in Practical Measurements in Science,
Engineering and Technology, John Wiley & Sons, Inc. New York.

Bird, R.E. and Hulstrom, R.L. (1981). A Simplified Clear Sky Model for
Direct and Diffuse Insolation on Horizontal Surfaces, SERI/TR-642-761,
Golden, CO: Solar Energy Research Institute.

Cachorro, V.E., de Frutos, A.M., and Casanova,
J.L. (1987). Determination of the Angstrom Turbidity Parameters,
Applied Optics, Vol. 26, No. 15, pp. 3069-3076.

Dutton, E.G., DeLuisi, J.J., and Austring, A.P. (1985). Interpretation
of Mauna Loa Atmospheric Transmission Relative to Aerosols, Using
Photometric Precipitable Water Amounts, J. Atmos. Chem. 3, pp. 53-68.

Flowers, E.C. and Helfert, N.F. (1966). Laboratory and Field
Investigations of Eppley Radiation Sensors, Monthly Weather Review,
Vol. 94, No. 4, pp. 259-264.

Flowers, E.C. and Starke, P.P. (1966). Results of a Field Trip to
Compare Pyranometers, unpublished report of the National Oceanic and
AtmosphericAdministration. Copies available from the Technical Inquiry
Service, National Renewable Energy Laboratory, Golden, CO 80401.

Frohlich, C. (1980). Monitoring of Atmospheric Turbidity with
Sunphotometers, WMO No. 549, World Meteorological Organization,
Geneva, Switzerland.

Garrison, J.D. and Adler, G.P. (1990). Estimation of Precipitable
Water over the United States for Application to the Division of Solar
Radiation into its Direct and Diffuse Components, Solar Energy,
Vol. 44, No. 4, pp. 225-241.

Hallaron, T.S. (1982). Development of an Automated System to Measure
Atmospheric Turbidity, M.S. Thesis, Trinity University, San Antonio,
Texas.

Iqbal, Muhammad (1983). An Introduction to Solar Radiation. Academic
Press, New York, Chap. 7, 169-213.

Mendonca, B.G., Hanson, K.J., and DeLuisi, J.J. (1978). Volcanically
Related Secular Trends in Atmospheric Transmission at Mauna Loa,
Hawaii, Science, 202, pp. 513-515.

Morris, A.L. and Barras, R.C., editors (1977). Air Quality Meteorology
and Atmospheric Ozone, ASTM Special Technical Publication 653,
American Society for Testing and Materials, Philadelphia,
Pennsylvania.

Myers, D.R., Emery, K.A., and Stoffel, T.L. (1989). Uncertainty
Estimates for Global Solar Irradiance Measurements Used to Evaluate PV
Device Performance, Solar Cells, 27, pp. 455-464.

NCDC (1981). Typical Meteorological Year User's Manual, National
Climatic Data Center, Asheville, NC 28801.

NREL (1993). User's Manual for Quality Assessment of Solar Radiation
Data, to be published in 1993 by the National Renewable Energy
Laboratory, Golden, CO 80401.

Randall, C.M., and Whitson, M.E. Jr. (1977). Hourly Insolation and
Meteorological Data Bases Including Improved Direct Insolation
Estimates, Aerospace Report No. ATR-78(7592)- 1, 1 December 1977, The
Aerospace Corporation, E1 Segundo, CA.

Randall, C.M. and Bird, R. (1989). Insolation Models and
Algorithms. In R.L. Hulstrom (Ed.),Solar Resources. The MIT Press,
Cambridge, MA. Chap. 3, pp. 61-144.

Schneider, H.R., Ko, M.K.W., Peterson, C.A., and Nash,
E. (1991). Interannual Variations of Ozone: Interpretation of 4 Years
of Satellite Observations of Total Ozone, Journal of Geophysical
Research, Vol. 96, No. D2, pp. 2889-2896.

SOLMET, Vol. 1 (1978), User's Manual - Hourly Solar Radiation -
Surface Meteorological Observations, TD-9724, Asheville, NC: National
Climatic Data Center.

SOLMET, Vol. 2 (1979), Final Report - Hourly Solar Radiation - Surface
Meteorological Observations, TD-9724, Asheville, NC: National Climatic
Data Center.

Valko, Peter (1980). Some Empirical Properties of Solar Radiation and
Related Parameters, DOE/ER-0084, EA Task IV, An Introduction to
Meteorological Measurements and Data Handling for Solar Energy
Applications, U.S. Department of Energy, Washington, DC.

Wells, C.V. (1992). Measurement Uncertainty Analysis Techniques
Applied to PV Performance Measurements, Proceedings Photovoltaic
Performance and Reliability Workshop, National Renewable Energy
Laboratory, Golden, CO 80401.

WMO (1967). A Note on Climatological Normals, WMO No. 208,
T.N. No. 84, World Meteorological Organization, Geneva, Switzerland.

Yevjevich, V. (1972). Stochastic Processes in Hydrology, Water
Resources Publications, Fort Collins, Colorado.

[References Extracted from Section 11.0 of the National Solar
Radiation Data Base User's Manual]