Proceedings of the International Symposium on Numerical Reference Data for Science and technology, Warsaw, August 20-30, 1969 - International Symposium on Numerical Reference Data for Science and Technology (1969 : Warsaw). (Wroclaw: Zaklad Narodowy Imienia Osslinskich-Wydawnictwo, 1969)
Keywords: Science -- Information services -- Congresses; Communication in science -- Congresses; Technology -- Information services -- Congresses; Communication of technological information -- Congresses