Proceedings of the International Symposium on Numerical Reference Data for Science and technology, Warsaw, August 20-30, 1969/ 
(edited by Jan Malczynski). 
 - Wroclaw:  Zaklad Narodowy Imienia Osslinskich-Wydawnictwo/  1969. 
 - 399 p.;   24 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science--Information services--Congresses.<br/>Communication in science--Congresses.<br/>Technology--Information services--Congresses.<br/>Communication of technological information--Congresses.