TY  - BOOK
T1  - Mines and Quarries: 1929 : General report and reports for states and for industries
T2  - Fifteenth Census of the United States: 1930
PP  - Washington
PB  - Gov. Print. off.
YR  - 1933
UL  - http://vufind10-pruebas.sigbunlp.bibliotecas.unlp.edu.ar/Record/dun.144404
OP  - 413
NO  - Prepared Under the Supervision of Frederick E. Berquist
ER  -