Classification
003 - Systems
1
006 - Special computer methods
1
181 - Eastern philosophy
1
300 - Social sciences
1
301 - Sociology & anthropology
1
512 - Algebra
1
519 - Probabilities & applied mathematics
1
535 - Light & infrared & ultraviolet phenomena
1
541 - Physical chemistry
1
581 - Specific topics in natural history
1
940 - History of Europe
1