Soil survey of Erie County, Pennsylvania United States. Soil Conservation Service Published: 1960 Total Pages: 592 Get eBook
Soil Survey of Cortland County, New York United States. Soil Conservation Service Published: 1957 Total Pages: 200 Get eBook
Great Lakes Basin Library: Interim Bibliography United States. Great Lakes Basin Commission Published: 1969 Total Pages: 452 Get eBook
Geological Survey Professional Paper Geological Survey (U.S.) Published: 1963 Total Pages: 80 Get eBook