1. Making a World of Difference: Engineering Ideas Into Reality
by National Academy of Engineering 
Price: USD 48.07
Dealer: Alibris, Hay-on-Wye Booksellers via Alibris
Description: [S.l.] National Academies Press 2014 Trade paperback Good. Unused. Cover has considerable scuffs as well as creases/scratches. Storage bend down length of cover/pages. Ink smudges on back page. Text/images in very good condition. Trade paperback (US). Glued binding. 62 p. 

2. Making a World of Difference: Engineering Ideas into Reality
by National Academy Of Engineering 
Price: USD 38.89
Dealer: AbebooksUK, Hay-on-Wye Booksellers
Description: ISBN10: 0309312655, ISBN13: 9780309312653, [publisher: National Academies Press] Softcover Unused. Cover has considerable scuffs as well as creases/scratches. Storage bend down length of cover/pages. Ink smudges on back page. Text/images in very good condition. [Hay-on-Wye, HEREF, United Kingdom] [Publication Year: 2014]