Nuffield mathematics project. 

 - [London]:   W and R Chambers,   John Murray  [1968]-[1969].  
 - 2 v. :  ill. ;  24 cm. 
<br/><br/>V. 1. Beginnings--v. 2. Graphs leading to algebra. 
<br/><br/><label>ISBN: </label>0550770097 0550770070 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics--Teaching
<br/><br/><label>Dewey Class. No.: </label>372.7044