Low-cost instrumentation based on operational amplifiers for potentiometry and conductometry with illustrative experiments / 
UNESCO 
 - [Place of publication not identified] :  International Union of Pure and Applied Chemistry, Committee on Teaching of Chemistry,  190? 
 - x, 82 p. :  ill. ;  32 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Chemical apparatus
<br/><br/><label>Dewey Class. No.: </label>542.1  / LOW 190?