The Bibliography on Snow, Ice and Permaforst with Abstracts (CRREL Report 12) was initiated in 1952 and is a continuing project of the Science and Technology Division, Cold Regions Project Section of the LIBRARY OF Congress, prepared for the U.S. Army Cold Regions Research and Engineering Laboratory (USA CRREL) of the Corps of Engineers. Volumes 1-15 were issued as SIPRE Report 12. Volume 16 was the first issued under the new title CRREL Report 12. The present Volume 17 includes abstracts SIP 20001-21000. Primarily, the bibliography provides USA CRREL with current and comprehenbive coverage on scientific imformation, both basic and applied, about living and operating in the polar and subpolar regions. The subjects covered vary from ablation to whiteout and include such diverse topics as avalanche forecasting, ice crystallography, snow mechanics, frost effects, tunneling and excavations, development of trafficable surfaces, permafrost const9uction, and various phases of heat and mass budgets. (Author).