Classification
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333 - Economics of land & energy
1,952
335 - Socialism & related systems
5
336 - Public finance
131
337 - International economics
2
338 - Production
8
339 - Macroeconomics & related topics
1
340 - Law
8,294
342 - Constitutional & administrative law
4
343 - Military, tax, trade & industrial law
2
344 - Labor, social, education & cultural law
1
345 - Criminal law
1
347 - Civil procedure & courts
2
350 - Public administration & military science
125
351 - Public administration
2
353 - Specific fields of public administration
2
354 - Administration of economy & environment
1
355 - Military science
3
360 - Social problems & services; associations
57
361 - Social problems & social welfare in general
184
362 - Social welfare problems & services
3
363 - Other social problems & services
835
364 - Criminology
43
368 - Insurance
1
370 - Education
1,095
371 - Schools & their activities; special education
1
378 - Higher education
2
379 - Public policy issues in education
1
380 - Commerce, communications & transportation
471
382 - International commerce
5
388 - Transportation; ground transportation
1
398 - Folklore
5
400 - Language
231
410 - Linguistics
82
414 - Phonology & phonetics
20
450 - Italian, Romanian & related languages
1
491 - East Indo-European & Celtic languages
3
500 - Natural sciences & mathematics
216
520 - Astronomy & allied sciences
11
530 - Physics
52
540 - Chemistry & allied sciences
18
550 - Earth sciences
20
551 - Geology, hydrology & meteorology
219
553 - Economic geology
1
576 - Genetics & evolution
1,456
580 - Plants (Botany)
40
581 - Specific topics in natural history
109
600 - Technology
683
603 - Dictionaries & encyclopedias
2
610 - Medicine & health
864
612 - Human physiology
1
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