Jones, Peter L. <br/><br/>
A study of proportional reasoning / 
Peter L. Jones. 
 - Lae :  Papua New Guinea University of Technology, Dept. of Mathematics,  1979. 
 - 12p. 
 - Report (Papua NEw Guinea University of Technology. Department of Mathematics) ; no. 12 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Thought and thinking.<br/>Mathematics--Study and teaching.<br/>Logic.