Space Shuttle External Tank (Lightweight Model) Layout Drawings, Vol 2. Martin Marietta, 1983. ~100pp.

Large collection of oversize 17" x 11" vintage layout drawings for the Space Shuttle External Tank (Lightweight Model). Contains 91  technical drawings showing everything you’ve ever wanted to know about the eternal tank!
 
Cover is VG+, with some minor bend and wear at right edge of front and back cover. Condition of the drawings is fine.
 
From the estate of a former NASA/MSFC propulsion engineer in Huntsville, Alabama. A great vintage Shuttle document.  Extremely rare.