SP18 Cretaceous Fossils from the Chesapeake and Delaware Canal: A Guide for Students and Collectors |
Lauginiger, E.M. |
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OFR21 A Guide to Fossil Sharks, Skates, and Rays from the Chesapeake and Delaware Canal Area, Delaware |
Lauginiger, E.M., Hartstein, E.F. |
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RI32 Removal of Metals from Laboratory Solutions and Landfill Leachate by Greensand Filters |
Spoljaric, N., Crawford, W.A. |
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OFR5 Removal of Metallic Contaminants from Industrial Waste Waters by the Use of Greensands, A Preliminary Report |
Spoljaric, N., Crawford, W.A. |
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B11 Ground-Water Resources of Southern New Castle County Delaware |
Rima, D.R., Coskery, O.J., Anderson, P.W. |
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B7 Engineering Materials of Northern New Castle County |
Ward, R.F., Groot, J.J. |
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