Our world of science /
Our world of science /
edited by Janaki Galappatti and Nirmali Hettiarachchi
- Colombo : The British Council, Colombo, c1990.
- 82 p. ; ill. ; 22 cm.
9559055135
Science
Q163 / .O97 1990
9559055135
Science
Q163 / .O97 1990