Classification
000 - Computer science, information & general works
3
530 - Physics
540 - Chemistry & allied sciences
700 - The arts; fine & decorative arts
333 - Economics of land & energy
2
380 - Commerce, communications & transportation
2
140 - Specific philosophical schools
1
304 - Factors affecting social behavior
1
330 - Economics
1
580 - Plants (Botany)
1