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Citations

1. Allan, P. F., L. E. Garland, and R. Dugan. 1963. Rating northeastern soils for
their suitability for wildlife habitat. 28th North Am. WildI. Nat. Resour. Conf. Wildl. Manage. Inst., pp.247-261, illus.

2. American Association of State Highway [and Transportation] Officials. 1970.
Standard specifications for highway materials and methods of sampling and testing. Ed. 10, 2 vol.,illus.

3. American Society for Testing and Materials. 1974. Method for classification of
soils for engineering purposes. ASTM Stand. D 2487-69. In: 1974 Annual Book of ASTM Standards, Part 19, 464 pp., illus.

4. Cunningham, R. I., G. W. Peterson, R. W. Ranney, and R. P. Matelski. 1969.
Characteristics, interpretations and uses of Pennsylvania soils - Northampton County. The Pennsylvania State University. Progress Report 295. 40 pp.

5. Ferguson, Roland H. 1968. The timber resources of Pennsylvania. U.S. Dept.
Agriculture, Forest Service Res. Bull. NE-8, 147 pp., illus.

6. Matelski, R. P. 1975. The field percolation rate of the soils of
Pennsylvania for septic tank drainage fields. The Pennsylvania State University, College of Agriculture, Agricultural Experiment Station. Progress Report 345.

7. McCarthy, E. F. 1933. Yellow-poplar characteristics, growth, and
management. U.S. Dept. Agriculture. Tech. Bull. No.356, 58 pp., illus.

8. Schnur, G. Luther. 1937. Yields, stands, and volume tables for even-aged upland
oak forest. U.S. Dep. Agriculture Tech. Bull. 560, 88 pp., illus. [Reprinted 1961.]

9. United States Department of Agriculture. 1951. Soil survey manual. U.S. Dept.
Agriculture Handbook 18, 503 pp., illus. [Supplements replacing p.173-188 issued May 1962]

10.United States Department of Agriculture. 1975. Soil taxonomy: a basic system
of soil classification for making and interpreting soil surveys. Soil Conservation Service U.S. Dept. Agriculture Handbook 436, 754 pp., illus.

11.Yeloushan, Charles C. 1970. The mineral industry of Pennsylvania in 1968. Penn.
Geol. Survey, Information Circular 69, 22 pp., illus.

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