00547nam a2200121Ia 4500 241112s9999||||xx |||||||||||||| ||und|| WELLMAN, Barry Social structures:A network approach Cambridge Cambridge University Press 1988 SOCIAL STRUCTURE | SOCIAL SYSTEM | SOCIAL CLASSES BERKOWITZ, S D Eds BK 0 0 0 0 MIDS MIDS 0000-00-00 0 301.44 M8 26505 2024-11-12 17:41:21 2024-11-12 BK 90852 90852