TY  - BOOK
AU  - DURHAM, EDWAED B.
TI  - MINE SURVEYING
T2  - 0
U1  - 549 
PY  - 1931///
CY  - LONDON-U.S.A.
PB  - MCGRAW-HILL BOOK COMPANY
KW  - CIENCIAS PURAS
N1  - METHODS-SURVEYING-TUNNEL
ER  -