TY  - BOOK
AU  - Simons,Frank S.
AU  - Mapes Vázquez,Eduardo
TI  - Geology and ore deposits of the Zimápán mining district,: State of Hidalgo, Mexico,
AV  - QE75 .P9 no. 284
PY  - 1956///
CY  - Washington
PB  - U.S. Govt. Print. Off.
KW  - Geology
KW  - Mexico
KW  - Hidalgo (State)
KW  - Mines and mineral resources
N1  - Part of illustrative matter in pocket; Bibliography: p. 123-124
ER  -