Low-cost science and technology materials at the primary school level :
Low-cost science and technology materials at the primary school level : exampleof national institutions of Democratic People's Republic ofKorea, People's Republic of China and Brasilia.
- Korea : Ministry of Foreing Affairs; National Commission for Unesco, 1990.
- 60 p. ; il.
372.8: 373.3 =20 "1990" LOW.
372.8: 373.3 =20 "1990" LOW.