Mathematics Degrees of Unsolvability. (AM-55), Volume 55 Gerald E. Sacks Series: Annals of Mathematics Studies Paperback ISBN: 9781400881840 Published: Mar 2, 2016 Copyright: 1964 ebook ISBN: 9781400881840 Published: Mar 2, 2016 Copyright: 1964 Buy This Download Cover Share Overview The description for this book, Degrees of Unsolvability. (AM-55), Volume 55, will be forthcoming.