American national standard for ladders - portable metal - safety requirements / Secretariat, American Ladder Institute.

Bibliographic Details
Corporate Authors:	American Ladder Institute American National Standards Institute
Language:	English
Published:	New York, N.Y. : American National Standards Institute, [1982], ©1982.
Subjects:	Ladders > Safety measures > Standards.
Physical Description:	67 pages : illustrations, forms ; 28 cm
Format:	Book

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