The Baron's Den is proud to offer this historical NASA item from the personal collection of Walter Turner, a Senior Engineer for NASA. Walter Turner was a Space Experiments Engineer at NASA from 1995 to 2005. From 2005 until his death in 2021 he was a Senior Engineer for Integration and the Flight Test Management Office (FTMO) This Listing is for an Item(s) from Walter Turner's personal collection. It's Authenticity is guaranteed. Please see the last 3 pictures of this listing for examples of provenance. (these items are not included in the sale, rather they are pictured for authentication purposes) You can request a letter of authenticity from our company, The Baron's Den, certifying the acquisition and disposition of this item(s). If desired, please message us with the LOA request at the same time you make payment. For your Consideration: NASA conference publication, 1993 Interdisciplinary, science and engineering in the era of cyberspace Please see pictures for condition. Free domestic shipping is carrier and method of my choice.