00655cam a22002171 4500 gs 58000173 DLC 20260227111406.0 790607s1957 inu b s000 0 eng gs 58000173 (OCoLC)5044661 DLC TxCM DLC QE109 .A3 no. 11 Murray, Haydn H. (Haydn Herbert), 1924- Pennsylvanian underclays: potential bonding clays for use in foundries. Bloomington, 1957. 27 p. Indiana. Geological Survey. Report of progress, no. 11 "Literature cited": p. 27. Clay Indiana. 29248 29248