Research in industrial education summaries of Studies, 1930-1955.

Manylion Llyfryddiaeth
Prif Awdur:	U. S. Dept. of Health, Education, and Welfare
Fformat:	Llyfr
Iaith:	English
Cyhoeddwyd:	Wasington Govt. Print Off. 1957.
Pynciau:	Manual training.