Classification
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344 - Labor, social, education & cultural law
3
515 - Analysis
3
591 - Specific topics in natural history
3
700 - The arts; fine & decorative arts
3
155 - Differential & developmental psychology
2
324 - The political process
2
379 - Public policy issues in education
2
519 - Probabilities & applied mathematics
2
530 - Physics
2
570 - Life sciences; biology
2
571 - Physiology & related subjects
2
620 - Engineering & allied operations
2
930 - History of ancient world to ca. 499
2
940 - History of Europe
2
011 - Bibliographies
1
036 - Encyclopedias in Spanish & Portuguese
1
150 - Psychology
1
201 - Religious mythology & social theology
1
325 - International migration & colonization
1
328 - The legislative process
1
335 - Socialism & related systems
1
336 - Public finance
1
337 - International economics
1
341 - Law of nations
1
352 - General considerations of public administration
1
355 - Military science
1
362 - Social welfare problems & services
1
370 - Education
1
372 - Elementary education
1
381 - Commerce
1
388 - Transportation; ground transportation
1
407 - Education, research & related topics
1
520 - Astronomy & allied sciences
1
526 - Mathematical geography
1
541 - Physical chemistry
1
579 - Microorganisms, fungi & algae
1
600 - Technology
1
612 - Human physiology
1
616 - Diseases
1
627 - Hydraulic engineering
1
636 - Animal husbandry
1
641 - Food & drink
1
693 - Specific materials & purposes
1
709 - Historical, geographic & persons treatment
1
791 - Public performances
1
909 - World history
1
941 - British Isles
1
944 - France & Monaco
1
951 - China & adjacent areas
1
960 - History of Africa
1
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