TY  - BOOK
AU  - Greaves-Walker, A. F
TI  - The origin, mineralogy and distribution of the refractory clays of the United States
PY  - 1939///
CY  - North Carolina State College of Agriculture and Engineering
PB  - Raleigh
UR  - http://14.139.222.13:80/cgi-bin/koha/opac-detail.pl?biblionumber=1551
ER  -