This recent find comes from Estate of a NASA MSFC/ABMA Engineer and is a 1987 NASA MSFC MARTIN MARIETTA SPACE SHUTTLE POST Space Shuttle Challenger Accident - (Back to Flight Era) Volume I "System Definition Handbook" for the Space Shuttle External Tank. This approximately 250 page Handbook includes multiple fold outs and lots of drawings/designs. Fold-outs are 11"x17". Handbook is in Excellent overall condition for use and age with only minor expected age/storage wear. Please see all Pictures and Condition description and to see More Vintage/Antique Collectibles from this Estate, other Estates and several Picks just Click on my Store link and Thank you for Looking...