TY  - RPRT
TI  - Guide to the use of PACER, the data retrieval and update system for the National Coal Resources Data System (NCRDS)
AU  - K.K. Krohn
AU  - M.A. Carey
AU  - M.D. Carter
AU  - A.L. Medlin
PY  - 1982
DO  - 10.3133/ofr82291
UR  - https://pubs.usgs.gov/publication/ofr82291
ID  - ofr82291
ER  -