Keedy, M. L. (1964). Exploring modern mathematics. California State Dept.
Lua i Stíl Chicago (17ú heag.)Keedy, Marvin L. Exploring Modern Mathematics. Sacramento, Calif: California State Dept, 1964.
Lua MLA (9ú heag.)Keedy, Marvin L. Exploring Modern Mathematics. California State Dept, 1964.
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