TY  - BOOK
T1  - Engineering classification of in-situ rock
T2  - Technical Report; no. AFWL-TR-67-144
A1  - Deere, Don U.
A2  - Merritt, Andrew H.
A2  - Coon, Richard F.
LA  - English
PP  - Illinois
PB  - University of Illinois
YR  - 1969
UL  - http://vufind10-pruebas.sigbunlp.bibliotecas.unlp.edu.ar/Record/dfi.23423
OP  - 280
KW  - ROCAS
ER  -