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Bibliographic Details
Main Author:	Lehrburger, Egon
Other Authors:	Medina, B.S, Escasa, Alfredo S., Escasa, Nenita O.
Format:	Book
Language:	Filipino English
Published:	Maynila Regal Printing 1969,c1975.
Edition:	Panibagong edisyon.
Subjects:	Inventions. Technology > History.