Schaefer, B. K. (1972). Classification of the literature of mathematics: A comparative analysis of the American Mathematical Society and the Library of Congress schemes.
Chicago-viite (17. p.)Schaefer, Barbara Kirsch. Classification of the Literature of Mathematics: A Comparative Analysis of the American Mathematical Society and the Library of Congress Schemes. ???, 1972.
MLA-viite (8. p.)Schaefer, Barbara Kirsch. Classification of the Literature of Mathematics: A Comparative Analysis of the American Mathematical Society and the Library of Congress Schemes. 1972.
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