TY  - BOOK
AU  - Stout,Wilber
ED  - Geological Survey of Ohio.
TI  - Marl, tufa rock, travertine, and bog ore in Ohio
T2  - Bulletin
AV  - QE151 .A18 no. 41
PY  - 1940///
CY  - Columbus, Ohio
PB  - Geological Survey of Ohio
KW  - Marl
KW  - Travertine
KW  - Ohio
KW  - Limestone
KW  - Iron ores
N1  - Includes bibliographical references
ER  -