Simmons, George, 1925- Differential equations theory , technique and practice / [[Book] :] George Simmons , steven g. krantz. - new york : mc graw hill, 2007. - 534p : ill ; 24cm. ISBN: 9780071254373 0071254374 Dewey Class. No.: 515.3 National Library of Medicine Call No.: 515.3 / S D