Classification
330 - Economics
361 - Social problems & social welfare in general
500 - Natural sciences & mathematics
000 - Computer science, information & general works
1
331 - Labor economics
1
333 - Economics of land & energy
1
338 - Production
1
380 - Commerce, communications & transportation
1
576 - Genetics & evolution
1
658 - General management
1
670 - Manufacturing
1