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NATURAL SCIENCE SECTION OF THE ONTARIO EDUCATIONAL ASSOCIATION

1909 School Science and Mathematics  

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doi:10.1111/j.1949-8594.1909.tb03178.x fatcat:gzr64e6bxnajrccm7vrma25zjq
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"NATURAL SCIENCE SECTION OF THE ONTARIO EDUCATIONAL ASSOCIATION." School Science and Mathematics 9.7 (1909) 704-704