TY  - RPRT
TI  - Preliminary map of pingos in National Petroleum Reserve in Alaska
AU  - John P. Galloway
AU  - L. David Carter
PY  - 1978
DO  - 10.3133/ofr78795
UR  - https://pubs.usgs.gov/publication/ofr78795
ID  - ofr78795
ER  -