Classification
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363 - Other social problems & services
1
384 - Communications; telecommunication
1
520 - Astronomy & allied sciences
1
551 - Geology, hydrology & meteorology
1
576 - Genetics & evolution
1
615 - Pharmacology & therapeutics
1
616 - Diseases
1
620 - Engineering & allied operations
1
630 - Agriculture & related technologies
1
650 - Management & auxiliary services
1
664 - Food technology
1
725 - Public structures
1
770 - Photography, photographs & computer art
1
779 - Photographs
1
891 - East Indo-European & Celtic literatures
1
951 - China & adjacent areas
1