Gross, P., & Railton, E. P. (1972). Teaching science in an outdoor environment. University of California.
Citace podle Chicago (17th ed.)Gross, Phyllis, a Esther P. Railton. Teaching Science in an Outdoor Environment. Berkeley: University of California, 1972.
Citace podle MLA (9th ed.)Gross, Phyllis, a Esther P. Railton. Teaching Science in an Outdoor Environment. University of California, 1972.
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