Science in action

Sonraí bibleagrafaíochta
Údar corparáideach:	Pennsylvania Dept of Public Instruction
Formáid:	LEABHAR
Teanga:	English
Foilsithe / Cruthaithe:	Harrisburg, Pa. Dept. of Public Instruction c1963-1964.
Ábhair:	Science > Experiments. . Science > Problems, exercises, etc.