STEINLAGE, R. C. (1981). College algebra and trigonometry. Goodyear Pub. Co.
Chicago-čujuhus (17. p.)STEINLAGE, Ralph C. College Algebra and Trigonometry. California: Goodyear Pub. Co, 1981.
MLA-čujuhus (9. p.)STEINLAGE, Ralph C. College Algebra and Trigonometry. Goodyear Pub. Co, 1981.
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