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Displaying items 51-60

618 - Gynaecology. Obstetrics (1)
621 - Mechanical engineering in general. Nuclear technology. Electrical engineering. Machinery (1)
623 - Military engineering (1)
626/627 - Hydraulic engineering and construction. Water (aquatic) structures (1)
627 - Natural waterway, port, harbour and shore engineering. Navigational, dredging, salvage and rescue facilities. Dams and hydraulic power plant (1)
63 - Agriculture and related sciences and techniques (1)
631 - Agriculture in general (1)
632 - Plant damage, injuries. Plant diseases. Pests, organisms injurious to plants. Plant protection (1)
633 - Field crops and their production (1)
634 - Fruit growing (1)