Frequency standards and metrology  proceedings of the fourth symposium, Ancona, Italy, September 5-9,1988 
edited by Andrea De Marchi 
 - Berlin  Springer-Verlag  1989 
 - xx, 484p. 
<br/><br/><label>ISBN: </label>3-540-50818-X 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Astronomy and Astrophysics Thesaurus
<br/><br/><label>Universal Decimal Class. No.: </label>389  / MAR