Classification
720 - Architecture
138
696 - Utilities
105
690 - Buildings
38
621 - Applied physics
36
304 - Factors affecting social behavior
30
333 - Economics of land & energy
30
624 - Civil engineering
21
691 - Building materials
16
620 - Engineering & allied operations
15
006 - Special computer methods
12
307 - Communities
12
697 - Heating, ventilating & air-conditioning
10
628 - Sanitary & municipal engineering
7
910 - Geography & travel
7
338 - Production
6
577 - Ecology
6
660 - Chemical engineering
4
670 - Manufacturing
4
363 - Other social problems & services
3
352 - General considerations of public administration
2
519 - Probabilities & applied mathematics
2
550 - Earth sciences
2
629 - Other branches of engineering
2
693 - Specific materials & purposes
2
710 - Civic & landscape art
2
003 - Systems
1
204 - Religious experience, life & practice
1
303 - Social processes
1
306 - Culture & institutions
1
321 - Systems of governments & states
1
330 - Economics
1
351 - Public administration
1
600 - Technology
1
610 - Medicine & health
1
631 - Techniques, equipment & materials
1
711 - Area planning
1
740 - Drawing & decorative arts
1