Schlebecker, John T <br/><br/>
Agricultural implements and machines in the collection of the national museum of history and technology  

 - Washington:   Smithsonian Institution Press,   1972 
 - iii, 57p.  
 - Smithsonian studies in history and technology   17 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agriculture 
<br/><br/><label>Subjects--Index Terms: </label>Farm machinery  Crops