Bushuev, A. V., R. G. Barry, V. M. Smolyanitsky, and V. J. Troisi. 1994. Format to Provide Sea Ice Data for the World Climate Program (SIGRID-2). Unpublished report to the World Meteorological Organization Commission for Marine Meteorology. Environment Canada. 1989. Ice Charts: WMO Symbols for the Hatching of Total Concentration of Ice. Manual of Standard Procedures for Observing and Reporting ... Ice Conditions. Atmospheric Environment Service, Ottawa Ontario. p. 3-21 - 3-31. Environment Canada. 1992. Ice Terminology: Ice Codes and Symbols, Egg Code. MANIS, Manual of Ice Services. Atmospheric Environment Service. Ottawa, Ontario. sect. A.3. Kokaly, Raymond F. 1996. Format for Gridded Sea Ice Information (SIGRID). Special Report to theNational Snow and Ice Data Center, Boulder, Colorado. Kokaly, Raymond F. 1996. An Evaluation of the Results from Using Nearest Neighbor and Area Min/Max Resampling Methods to Regrid AARI Digitized Sea Ice Charts to EASE-Grid. S
pecial Report to theNational Snow and Ice Data Center, Boulder, Colorado. Thomas Thompson. 1981. Proposed Format for Gridded Sea Ice Information (SIGRID). Unpublished report prepared for the World Climate Programme.