Have you tried > https://www.loc.gov/rr/scitech//SciRefGuides/technicalmanuals3.html or do an FOIA for SB 11-640, ACTIVE, 02/23/1978, INSTALLATION OF TIEDOWN KIT AND FABRICATION OF DUNNAGE FOR INSTALLATION OF SHELTERS, ELECTRICAL EQUIPMENT,
to >
Supply Bulletins - Army Publishing...