New trends in chemistry teaching.
- Paris : Unesco press, 1981.
- Vols. : ill. ; 25 cm.
V. 5-- ;
300 300
92-3-101907-4
Chemistry.
540.7 / U3n
V. 5-- ;
300 300
92-3-101907-4
Chemistry.
540.7 / U3n
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