TY  - RPRT
TI  - Worldwide directory of national earth-science agencies
AU  - Wenonah E. Bergquist
AU  - R. L. Miller
AU  - A.L. Falk
AU  - J.A. Tyskowki
PY  - 1978
DO  - 10.3133/cir771
UR  - https://pubs.usgs.gov/publication/cir771
ID  - cir771
ER  -