References

References
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Forest Soils
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Neal, E. G., Woodland Ecology. Harvard Univers- ity Press, Cambridge, Mass., 1958.
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Odum, E. P. and H. T. Fundamentals of Ecology. W. B. Saunders Co., Philadelphia, 1959.
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Brade-Binks, S. G. Good Soil. English Univ. Press Ltd., London, 1959.
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Greweling and Peach. Chemical Soil Tests. Cornell Univ. Agricultural Experiment Station. New York College of Agriculture, Ithaca, New York Bul- letin 960, November 1960.
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Miller and Blaydes. Methods and Materials for Teaching Biological Sciences. McGraw-Hill Book Co., Inc., New York, 1938.
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American Biology Teacher, May1961, "Field Biol- ogy."
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