LEKKERKERKER, C.G. Geometry of numbers / [by] C.G.Lekkerkerker - Groningen Wolters-Noordhoff pub. 1969 - 510 p.- - Series bibliotheca mathematica; v.8 . Includes bibliography & index. ISBN: 46147 Subjects--Topical Terms: Number theory Dewey Class. No.: 512.7 / LEK