TY  - BOOK
AU  - Schumann Walther
AU  - Schumann Walther
TI  - Minerals and rocks : illustrated and identified with colour photographs
SN  - 0701123613 (pbk)
U1  - H2f, L7 
PY  - 1977///
CY  - London
PB  - C&W       
KW  - Minerals and rocks
ER  -