GEOPHYSICAL OBSERVATORY REPORTS, YEAR 1986-1987 - NAGYCENK GEOPHYSICAL OBSERVATORY (Sopron, 1991)
1986-1987
GEOPHYSICAL OBSERVATORY REPORT OF THE GEODETIC AND GEOPHYSICAL RESEARCH INSTITUTE OF THE HUNGARIAN ACADEMY OF SCIENCES YEAR 1986, 1987 OBSERVATORY OF NAGYCENK SOPRON 1991.