Wrench head bolts and nuts and wrench openings /
Sponsors: Society of Automotive Engineers (and) the American Society of Mechanical Engineers.

APA Citation

American Standards Association., American Society of Mechanical Engineers., American Society of Automotive Engineers. (1927). Wrench head bolts and nuts and wrench openings. New York, NY: American Society of Mechanical Engineers.

MLA Citation

American Standards Association, American Society of Mechanical Engineers, and American Society of Automotive Engineers. Wrench Head Bolts And Nuts And Wrench Openings. New York, NY: American Society of Mechanical Engineers, 1927.