ISBN 1588460673 books & textbook
Gamma World: Mutants and Machines (Gamma World d20 3.5 Roleplaying)
Bolack, David Hanrahan, Gareth O'Duffy, Patrick Wendig, Chuck
Arthaus /2003-11-03 Hardcover / 224 Pages
isbn-10: 1588460673 / isbn-13: 9781588460677