Classification
330 - Economics
363 - Other social problems & services
2
581 - Specific topics in natural history
000 - Computer science, information & general works
1
304 - Factors affecting social behavior
1
333 - Economics of land & energy
1
380 - Commerce, communications & transportation
1
500 - Natural sciences & mathematics
1
551 - Geology, hydrology & meteorology
1
576 - Genetics & evolution
1
580 - Plants (Botany)
1
600 - Technology
1
700 - The arts; fine & decorative arts
1