 The Nashville Number System by Chas Williams, 20050715
 The Structure of the Real Number System by Leon W. Cohen, Gertrude Ehrlich, 1963
 The Structure of Number Systems (Teachers' Mathematics Reference Series) by Francis D. Parker, 1966
 The Number System (Dover Books on Mathematics) by H. A. Thurston, 20070419
 Practice Problems in Number: Systems, Logic and Boolean Algebra by Edward Burstein, 197707
 Can You Count in Greek?: Exploring Ancient Number Systems, Grades 58 by Judy Leimbach, Kathy Leimbach, 20050601
 Landmarks In The Hundreds: The Number System
 Landmarks in the Thousands: The Number System (Investigations in Number, Data and Space Series by Andee Rubin, Susan J. Russell, et all 199705
 The Secret Life of Math: Discover How (And Why) Numbers Have Survived From The Cave Dwellers To Us! (A Williamson's Kids Can! Book) by Ann McCallum, 20050915
 THE NASHVILLE NUMBER SYSTEM DIAL A CHORD by John Duck, 2008
 The History of Zero: Exploring Our PlaceValue Number System (Math for the Real World) by Tika Downey, 200408
 The Number Systems: Foundations of Algebra and Analysis (AMS Chelsea Publishing) by Solomon Feferman, 200501
 Number Systems and the Foundations of Analysis by Elliott Mendelson, 20081218
 Introduction to Mathematical Thinking: Algebra and Number Systems by Will J. Gilbert, Scott A. Vanstone, 20040801
