Classification
363 - Other social problems & services
3
577 - Ecology
3
333 - Economics of land & energy
2
003 - Systems
1
004 - Data processing & computer science
1
301 - Sociology & anthropology
1
304 - Factors affecting social behavior
1
306 - Culture & institutions
1
320 - Political science
1
338 - Production
1
370 - Education
1
509 - Historical, geographic & persons treatment
1
572 - Biochemistry
1
600 - Technology
1
615 - Pharmacology & therapeutics
1
620 - Engineering & allied operations
1
809 - History, description & criticism
1