Teisseyre, R. XV Cracow 1976, ESC Proceedings, External Organizations;
http://bib.gfz-potsdam.de/pub/esc/esc-15-3-ocr.pdf (Any fulltext)
http://bib.gfz-potsdam.de/pub/esc/esc-15-3.pdf (Any fulltext)
Teisseyre, R. (Ed.)(1977): Proceedings of the XV General Assembly of the European Seismological Commission Krakow, 22-28 September 1976 (Part 3), (Publications of the Institute of Geophysics ; A-6 (117))(ESC-Proceedings ; 15.3), Warszawa : Polish Academy of Sciences, 204 p.