Keisler, H. Jerome <br/><br/>
Foundations of infinitesimal calculus / 
H. Jerome Keisler 
 - Boston, Mass. :  Prindle, Weber & Schmidt,  1976 
 - ix, 214 p. ;  26 cm. 
<br/><br/> Includes index 
<br/><br/><label>ISBN: </label>0871502151 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Calculus