00672nam0-2200241 --450 991059589070332120221020151828.020221020d1949----kmuy0itay5050 baengUS 001yy<<The >>social sciencesa problem approachPaul A. F. WalterNew YorkD. Van Nostrand Co.1949VII, 357 p.24 cm30023itaWalter,Paul Alfred Francis1260357ITUNINAREICATUNIMARCBK9910595890703321XV N 28452218FGBCFGBCSocial sciences2920699UNINA