Butler, I. S. (1971). Relevant Problems for chemical principles. W.A. Benjamin.
Tohutoru Kātū Chicago (17th ed.)Butler, Ian S. Relevant Problems for Chemical Principles. California: W.A. Benjamin, 1971.
Tohutoro MLA (9th ed.)Butler, Ian S. Relevant Problems for Chemical Principles. W.A. Benjamin, 1971.
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