EARTHWORM
benefits to man: lp 91-93; g77 10/8 31; g62 1/22 11
discussion: g76 11/8 21-22
industry: g76 9/22 30
production of humus: g61 9/22 16
role in fertilizing soil: g72 10/22 7
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EARTHWORM
benefits to man: lp 91-93; g77 10/8 31; g62 1/22 11
discussion: g76 11/8 21-22
industry: g76 9/22 30
production of humus: g61 9/22 16
role in fertilizing soil: g72 10/22 7