Ion-selective electrodes 
/ Proceedings of a symposium held at the National Bureau of Standards Gaithesburg, Marryland 30-31 January, 1969 
 - Washington:   National Bureau of Standards,   1969 
 - xxii, 452p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Proceedings
<br/><br/><label>Universal Decimal Class. No.: </label>621.3.035(082.2)  / K9