Johnson, Ken Crossing the river with dogs : Problem solving for college students / Ken Johnson, Ted Herr, Judy Kysh. - 1a ed. - United States of America : Key College Publishing, c2004 - xii, 490 p. : il. ; 23 cm. Incluye bibliografía e índice ISBN: 1931914141 Subjects--Topical Terms: Matemáticas--Solución de problemas LC Class. No.: QA63 / J64 2004