TY  - BOOK
AU  - Herold,Paul George
TI  - Study of Missouri shales for lightweight aggregate,
AV  - QE131 .A25 no. 23
U1  - 552.52 
PY  - 1958///
CY  - Rolla
KW  - Shale
KW  - Missouri
N1  - Bibliography: p. 39
ER  -