TY  - BOOK
AU  - Grim,Ralph E.
AU  - Schubert,Carl Edward
AU  - Rowland,Richards A.
TI  - (1) Elements of the petrographic study of bonding clays and of the clay substance of molding sands
T2  - Illinois. State geological survey. Report of investigations
AV  - TN941 .G77
U1  - 552/.52 
PY  - 1940///
CY  - Urbana, Ill.
KW  - Clay
KW  - Sand
N1  - At head of title: State of Illinois ... Department of registration and education ... Division of the State geological survey; "Reprinted from the Transactions of the American foundrymen's association, vol. 47, no. 4, pp. 895-908, 935-953; vol. 48, no. 1, pp. 211-224, 1940."; Bibliography: p.32
ER  -