Teisseyre, R. XV Cracow 1976, ESC Proceedings, External Organizations;
http://bib.gfz-potsdam.de/pub/esc/esc-15-1-ocr.pdf (Any fulltext)
http://bib.gfz-potsdam.de/pub/esc/esc-15-1.pdf (Any fulltext)
Teisseyre, R. (Ed.)(1977): Proceedings of the XV General Assembly of the European Seismological Commission Krakow, 22-28 September 1976 (Part 1), (Publications of the Institute of Geophysics ; A-4 (115))(ESC-Proceedings ; 15.1), Warszawa : Polish Academy of Sciences, 480 p.