CONFERENCE on Near-rings and near-fields ( 1985: Tubingen) Near-rings and near-fields /organized by University of Tubingen; edited by Gerhard Betsch - Amsterdam North - Holland pub. 1987 - xiv, 298 p.- - North - Holland mathematics studies; no.137 . Includes references ISBN: 444701915 Dewey Class. No.: 512.4 / CON