TY  - BOOK
AU  - Atta AVn,Robert O.
AU  - Ludowise,Harry
ED  - United States.
TI  - Microscopic and x-ray examination of rock for durability testing
U1  -  552.1 
PY  - 1976///
CY  - Washington, D. C.
PB  - United States Government Printing Office
KW  - Petrology
KW  - Rocks, Igneous
ER  -