An introduction to sets for thai teachers /
by Sneh Bunyahong , Pongsri Sakdapolaraks , Boonyeun Sermsaksakoon.
- Penang : SEAMEO Regional Centre for Edu. in Science and Mathematics, 1970.
- 141 p. : ill. ; 25 cm.
Pongsri Sakdapolaraks.
Mathematics--Study and teaching (Primary)--Thailand. Mathematics--1961-