TY  - BOOK
T1  - Earth materials /
DA  - [1973, c1971]
CY  - [Walton Hall, Bletchley, Bucks, England] :
ET  - Reprinted 1973 with corrections.
CN  - QE372.2
CN  - QE372.2
PB  - Open University Press,
PP  - [Walton Hall, Bletchley, Bucks, England] :
PY  - [1973, c1971]
ID  - 11201
KW  - Mineralogy.
SN  - 335021700
TI  - Earth materials /
ER  -