See also:
↑ 630agriculture in general → 338.1 343.076 580 ≈ S.SPEC.21.AE ↑ 632.32bacterial diseases of plants → 579.3 ≈ S.SPEC.21.AD
630
338.1 343.076 580 ≈ S.SPEC.21.AE
S.SPEC.21.AE
632.32
579.3 ≈ S.SPEC.21.AD
S.SPEC.21.AD
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