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Copyright 1997 The National Association of Biology Teachers
Linda S. Eyster, Jay Shiro Tashiro; Using Manipulatives to Teach Quantitative Concepts in Ecology: A Hands-On Method for Detecting & Correcting Misconceptions about Limiting Factors in Eutrophication & Vegetarianism. The American Biology Teacher 1 June 1997; 59 (6): 360–364. doi: https://doi.org/10.2307/4450330
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