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Page 1: stingrayscience.weebly.comstingrayscience.weebly.com/.../9/3/6/3/9363592/chapter_8.pdfCreated Date 3/13/2020 8:51:55 AM
Page 2: stingrayscience.weebly.comstingrayscience.weebly.com/.../9/3/6/3/9363592/chapter_8.pdfCreated Date 3/13/2020 8:51:55 AM
Page 3: stingrayscience.weebly.comstingrayscience.weebly.com/.../9/3/6/3/9363592/chapter_8.pdfCreated Date 3/13/2020 8:51:55 AM
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