TY  - BOOK
AU  - 
AU  - 
TI  - Nonmetallic Minerals
U1  - 553 LAD  2nd.ed.
PY  - 1951///
CY  - New York
PB  - McGraw-Hill
KW  - Nonmetallic minerals
N1  - Includes bibliographical references and indexs ( p.: 601 - 605 )
ER  -