TY  - BOOK
T1  - Sideritic concretions in Illinois shale, gravel, and till /
DA  - c1972.
CY  - Urbana :
AU  - Lamar, J. E.
CN  - QE105
CN  - QE105
PB  - Illinois State Geological Survey,
PP  - Urbana :
PY  - c1972.
ID  - 8711
KW  - Siderite
KW  - Concretions
TI  - Sideritic concretions in Illinois shale, gravel, and till /
ER  -