History of mathematics 
prepared by Graham Flegg 
 - Milton Keynes  The Open University Press  1974 
 - v. : ill. ; 30 cm. 
<br/><br/>Unit C3. Newton and Leibniz - Unit C4. The Calculus in the eighteenth century I : foundations - Unit N1. Counting I : primitive and more developed counting systems - Unit N2. Counting II : decimal number words, tallies and knots - Unit N3. Written numbers - Unit N4. Written fractions 
<br/><br/><label>ISBN: </label>0335050042 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics--History<br/>Numeration