Willis, Robert.  <br/><br/>
Principles of mechanism :  designed for the use of students in the universities and for engineering students generally / 
Willis Robert ; 
 - London :  John W. Parker,  1845. 
 - xxxi, 446 p. :  ill. ;  22 cm. 
<br/><br/>331  331 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mechanical movements.
<br/><br/><label>Subjects--Geographic Terms: </label>--London.
<br/><br/><label>Dewey Class. No.: </label>621 / W679P