http://dewey.info/scheme/a14/ en
631 Specific techniques; apparatus, equipment, materials
631.4 Soil science
631.401 Philosophy and theory
http://dewey.info/scheme/a14/ vi
631 Kỹ thuật cụ thể; máy móc, thiết bị, vật liệu
631.4 Khoa học đất
631.401 Triết học và lý thuyết
http://dewey.info/scheme/a14/ it
631 Specifiche tecniche; apparecchi, attrezzature, materiali
631.4 Pedologia
631.401 Filosofia e teoria
http://dewey.info/scheme/edition/e23/ en
631 Specific techniques; apparatus, equipment, materials
631.4 Soil science
631.41 Soil chemistry 631.42 Soil fertility, acidity, alkalinity 631.43 Soil physics 631.44 Soil classification 631.45 Soil erosion 631.46 Soil biology 631.47 Soil and land-use surveys 631.49 History, geographic treatment, biography of soil science
http://dewey.info/scheme/edition/e22/ de
631 Einzelne Techniken; Geräte, Ausstattung, Materialien
631.4 Bodenkunde
631.41 Bodenchemie 631.42 Bodenfruchtbarkeit, Bodenazidität, Basensättigung des Bodens 631.43 Bodenphysik 631.44 Bodenklassifikation 631.45 Bodenerosion 631.46 Bodenbiologie 631.47 Bodenuntersuchungen und Landnutzungsstudien 631.49 Geschichte, geografische Behandlung, Biografien der Bodenkunde
Dewey Decimal Classification
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