Ayres, F. (1954). Theory and problems of place and spherical trigonometry. McGraw-Hill.
शिकागो स्टाइल उद्धरणAyres, Frank. Theory and Problems of Place and Spherical Trigonometry. New York: McGraw-Hill, 1954.
एमएलए उद्धरणAyres, Frank. Theory and Problems of Place and Spherical Trigonometry. McGraw-Hill, 1954.
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