Legget, R. F., & Boswell, P. G. H. (1962). Geology and engineering (2nd ed.). New York : Tokyo: McGraw-Hill Kogakusha Company.
Παραπομπή Chicago StyleLegget, Robert Ferguson., and P. G. H. Boswell. Geology and Engineering. 2nd ed. New York : Tokyo: McGraw-Hill Kogakusha Company, 1962.
Παραπομπή MLALegget, Robert Ferguson., and P. G. H. Boswell. Geology and Engineering. 2nd ed. New York : Tokyo: McGraw-Hill Kogakusha Company, 1962.
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