TY  - RPRT
TI  - Geology and ore deposits of the Zimapan mining district, State of Hidalgo, Mexico
AU  - F. S. Simons
AU  - E. Mapes
PY  - 1956
DO  - 10.3133/pp284
UR  - https://pubs.usgs.gov/publication/pp284
ID  - pp284
ER  -