ISBN-13: 9781530201013 / Angielski / Miękka / 2016 / 112 str.
ISBN-13: 9781530201013 / Angielski / Miękka / 2016 / 112 str.
There are many thrilling incidents--all the more attractive because of their truth--in the study, the trials, the disappointments, the obstacles overcome, and the final triumph of the successful inventor.