TY  - BOOK
AU  - ADOLPH KNOF
TI  - ROCKS AND ROCK MINERALS
U1  - GN552.06P662R 
PY  - 1935///
CY  - LONDON
PB  - JOHN WILY & SONS, INC
KW  - ROCKS AND ROCK MINERALS
N1  - MODERN BOOK HOUSE, JABALPUR
ER  -