Logan, J. David A first course in differential equations / J. David Logan. - New York, NY : Springer, c2006. - xv, 289 p. : ill. ; 24 cm. - Undergraduate texts in mathematics . Includes index. ISBN: 9780387259635 (hardcover) 0387259635 (hardcover) LCCN: 2005926697 LC Class. No.: QA372 / .L64 2006