Classification
305 - Social groups
3
511 - General principles of mathematics
3
523 - Specific celestial bodies & phenomena
3
530 - Physics
3
155 - Differential & developmental psychology
1
184 - Platonic philosophy
1
201 - Religious mythology & social theology
1
325 - International migration & colonization
1
326 - Slavery & emancipation
1
341 - Law of nations
1
342 - Constitutional & administrative law
1
347 - Civil procedure & courts
1
361 - Social problems & social welfare in general
1
363 - Other social problems & services
1
401 - Philosophy & theory
1
427 - English language variations
1
515 - Analysis
1
520 - Astronomy & allied sciences
1
532 - Fluid mechanics; liquid mechanics
1
539 - Modern physics
1
549 - Mineralogy
1
551 - Geology, hydrology & meteorology
1
552 - Petrology
1
559 - Earth sciences of other areas
1
576 - Genetics & evolution
1
581 - Specific topics in natural history
1
629 - Other branches of engineering
1
647 - Management of public households
1
930 - History of ancient world to ca. 499
1
966 - West Africa & offshore islands
1
972 - Middle America; Mexico
1
979 - Great Basin & Pacific Slope region
1