Tobin, Allan J. Asking about life : preview book / Allan J. Tobin, Jennie Dusheck ; [edited by] Bonnie Boehme, Lee Marcott. - 2nd ed. - Philadelphia, PA : Harcourt College Publishers, 1999. - p. cm. ISBN: 0030222044 LCCN: 99068520 LC Class. No.: QH308.2 .T63 1999