Smythe, William R. <br/><br/>
Improving your written English  how to ensure your grammar, punctuation and spelling are up to scratch 
Marion Field 
 - Englewood Cliffs, N.J  Prentice-Hall  c 1966 
 - viii, 221 p.:  ill.;  24 cm 
<br/><br/>Includes bibliographical 
<br/><br/><label>ISBN: </label>66023373 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Linear programming