Terry, George S. <br/><br/>
The dozen system  an easier method of arithmetic 
[by] George S. Terry. 
 - [1st ed.] 
 - London  New York  Longmans Green  1941. 
 - 53 (i.e. 63) p.  illus., map., tables.  29 cm. 
<br/><br/> Reproduced from type-written copy.  Paged by the dozen system.  "Duodecimal protractor reading .002 circle" and table laid in. 
<br/><br/><label>LCCN: </label>41005267  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Numeration
<br/><br/><label>LC Class. No.: </label>QA141  / .T39 
<br/><br/><label>Dewey Class. No.: </label>511.2