Mayr, Otto <br/><br/>
Feedback mechanisms in the historical collections of the National Museum of History and Technology 

 - Washington :  Smithsonian Institution Press,  1971 
 - x, 133 p. :  ill. ;  27 cm. 
 - Smithsonian studies in history and technology ; no.12. .
<br/><br/>Includes bibliographical references 
<br/><br/><label>Subjects--Corporate Names: </label><br/>National Museum of History and Technology
<br/><br/><label>Subjects--Topical Terms: </label><br/>Feedback control systems--History<br/>Governors (Machinery)--History