Dental materials research 
/ Proceedings of the 50th Anniversary Symposium, National Bureau of Standards, Gaithersburg, Md., Oct. 6-8, 1969 
 - Washington, D.C.:   National Bureau of Standards,   1972 
 - vi, 231p. 
 - National bureau of standards special publication .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science
<br/><br/><label>Universal Decimal Class. No.: </label>616.314.089  / L2