Durrell, C. V. (1958). Matriculation trigonometry (1a.ed.). G. Bell and Sons LTD Editorial.
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Chicago-čujuhus (17. p.)
Durrell, Clement V. Matriculation Trigonometry. 1a.ed. London: G. Bell and Sons LTD Editorial, 1958.
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MLA-čujuhus (9. p.)
Durrell, Clement V. Matriculation Trigonometry. 1a.ed. G. Bell and Sons LTD Editorial, 1958.
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