Classification
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339 - Macroeconomics & related topics
1
361 - Social problems & social welfare in general
1
363 - Other social problems & services
1
368 - Insurance
1
501 - Philosophy & theory
1
509 - Historical, geographic & persons treatment
1
532 - Fluid mechanics; liquid mechanics
1
533 - Gas mechanics
1
536 - Heat
1
539 - Modern physics
1
551 - Geology, hydrology & meteorology
1
573 - Specific physiological systems in animals
1
577 - Ecology
1
624 - Civil engineering
1
629 - Other branches of engineering
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700 - The arts; fine & decorative arts
1
745 - Decorative arts
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781 - General principles & musical forms
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793 - Indoor games & amusements
1
803 - Dictionaries & encyclopedias
1