Chegukchuŭi /

by Chŏng, Sang-su, Chŏng, Sang-su
Published 2009

Noin pokchiron = Social welfare for the elderly /

by Chŏng, Sang-su
Published 2014

Ap'o, Hamch'ang kan ŭi munhwa yujŏk : Chungbu naeryuk kosok toro yejŏng kugan ŭi chip'yo chosa /

by Pak, Hyŏn-su, Yang, To-yŏng, Kim, Yong-sŏng, Kim, Kwang-myŏng, Chŏng, Sang-su, Kim, Ho-jin
Published 1996

Kŭmho, Tong Taegu kan ŭi munhwa yujŏk : Kyŏngbu kosok toro hwakchang kugan ŭi chip'yo chosa /

by Yu, Hong-jun, 1949-, Yang, To-yŏng, Kim, Kwang-myŏng, Chŏng, Sang-su, Kim, Ho-jin, Pak, Kye-yŏn
Published 1997