General topology and its relations to modern analysis and algebra IV:  Proceedings of the 4th Prague topological symposium, 1976, Part A : invited papers/ 
ed. by J. Novák. 
 - Berlin:  Heidelberg:  New York:  Springer-Verlag,  1977. 
 - 225 p.;  24 cm. 
 - Lecture notes in mathematics;  609. .
 - Lecture notes in mathematics (Springer-Verlag);  609. .
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