http://dewey.info/scheme/edition/e23/ en
333.95 Biological resources
333.953 Plants and microorganisms
333.95316 Plant conservation 333.9532 Rare and endangered plants 333.9533 Nonnative and native plants 333.9534 Germ plasm resources 333.9538 Seaweeds 333.9539 Plants as sources of energy
Dewey Decimal Classification
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