TY - BOOK AU - Waltman,Paul E. TI - A second course in elementary differential equations SN - 0127339108 AV - QA371 WAT 1986 U1 - 515.3/5 19 PY - 1986/// CY - Orlando PB - Academic Press KW - Differential equations N1 - INCLUDES INDEX; Includes bibliographies and index ER -