Gamger,M <br/><br/>
Tinker, tiller, technical change: technologies from the people/ 

 - New york  Bootstap  1990 
 - xviii, 278p; ill 
<br/><br/><label>ISBN: </label>0942850319 
<br/><br/><label>LC Class. No.: </label>T173.8.T56 1990