. . "Arithmetic / Foundations." . . "Arithmetic Foundations." . "Zahlensystem." . . "Théorie des nombres." . . "Számrendszer." . . "Teoria liczb." . . "The Number-system" . "This book explores arithmetic's underlying concepts and their logical development. It offers an informal and intuitive understanding of the rigorous logical approach, in addition to a detailed, systematic construction of the number systems of rational, real, and complex numbers. Numerous exercises help students test their progress and practice concepts. 1956 edition."@en . . . . . . . . . . . . . "The Number-System"@en . . . . . . . . . . "The Number System" . . . . . . . . . . "Electronic books" . "Electronic books"@en . . . . . . . . . . . . . . . . . . "The number - system" . . . . "The Number-system, by H. A. Thurston" . . . . . . . . . . . . "The number-system" . "The number-system"@en . "The number system" . "The number system"@en . "Aritmètica" . . "Numeri - Teoria." . . "Getaltheorie." . . "Number theory." . . "MATHEMATICS Mathematical Analysis." . . "Arytmetyka podstawy." . . "Arithmétique Fondements." . .