Stretchers and shrinkers Book 2 Advanced Topics in Stretching and Shrinking - Braunfeld, Peter G. (New York Harper & Row, 1969)
Contents: v. 1 The theory of stretching machines. -- v. 2 Advanced topics in stretching and shrinking. -- v.3 The theory of fractions. -- v.4 Decimals.
Keywords: Fractions; Decimal system