na INLIS000000000020993 20210426131933 210426||||||||| | ||| |||| || | /432 010-0421020993 id 30.001.5 30.001.5 PEN h PENNY, David H. Hints for research workers in the social science ed.rev. New York Center for International sudies and Departement of Agricultural Economis 1984 xx,157p;21cm sosial -- ilmu sosial -- penelitian sosial