▁in ▁econom ics ▁ 3 9 0 - 3 9 5 ........ .. Reg ional ▁planning ▁ 4 0 1 - 4 8 5 ........ ... R ural ▁groups . ▁R ural ▁soci ology ▁ 6 0 1 - 1 4 4 5 ........ .. Classes ▁ 6 2 1 - 6 3 5 ........ .. Origin ▁of ▁social ▁classes ▁ 6 4 1 - 6 5 7 ........ .. Classes ▁ar ising ▁from ▁birth ▁( In cluding ▁royal ty , ▁nob ility , ▁comm ons ) ▁ 6 7 5 - 6 9 0 ........ .. Classes ▁ar ising ▁from ▁occupation ▁ 7 1 3 - 7 2 5 ........ .. C aste ▁system ▁ 7 3 1 ........ .... .. Fre ed men ▁ 7 5 1 - 8 1 5 ........ .. Ser f dom ▁ 8 5 1 - 1 4 4 5 .... ..... S la very ▁ 1 5 0 1 - 1 5 9 5 .... ..... R aces ▁( In cluding ▁race ▁as ▁a ▁social ▁group ▁and ▁race ▁relations ▁in ▁general ) ▁ ▁H V ▁- ▁Social ▁path ology ; ▁Social ▁and ▁public ▁w elf are ; ▁C rimin ology ▁▁▁ 1 - 9 9 6 0 ................ So cial ▁path ology . ▁Social ▁and ▁public ▁w elf are . ▁C rimin ology ▁ 4 0 - 6 9 ................ So cial ▁service . ▁Social ▁work . ▁Char ity ▁organization ▁and ▁practice ▁ 8 5 - 5 2 5 ........ .... ... By ▁region ▁or