Schaum's outline of theory and problems of differential equations / by Frank Ayres. Theory and problems of differential equations. Ayres, Frank, 1901-1994. Differential equations Problems, exercises, etc. 19 517.38 AYT "Including 560 solved problems, completely solved in detail." "This book is designed primarily to supplement standard texts in elementary differential equations." New York : McGraw Hill, c1952. c1952. 1952 Text 296 p. ; eng Schaum's outline series Schaum's outline series.