Instruction manual for the Gentex SPH-4 pilot's protective helmet.

Bibliographic Details
Corporate Author:	Gentex Corporation
Format:	Book
Language:	English
Published:	Carbondale, Pa. : Gentex Corporation, [1969]
Subjects:	Flying helmets > United States > Handbooks, manuals, etc.

Description
Item Description:	Cover title. The Cushing Library/Ragan Military copy donated in memory of Robert L. Acklen, Jr., class of '63.
Physical Description:	16 pages : illustrations ; 22 cm.