Mason, John R. <br/><br/>
Switch engineering handbook / 
John R. Mason. 
 - New York :  McGraw-Hill,  c1993. 
 - 1 v. (various pagings) :  ill. ;  24 cm. 
<br/><br/><label>ISBN: </label>007040769X 
<br/><br/><label>Subjects--Index Terms: </label>Photoelectric Sensors, Proximity Devices, Pushbutton Switches, Membrane Switches 
<br/><br/><label>Dewey Class. No.: </label>621.317