Year is "1982"

Kijko, Andrzej (1982) A modified form of the first Gumbel distribution: model for the occurrence of large earthquakes. Part. I. Derivation of distribution. Acta Geophysica Polonica, XXX (4).

Lockner, David and Summers, R. and Moore, Diane and Byerlee, J.D. (1982) Laboratory measurements of reservoir rock from the Geysers geothermal field, California. International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts, 19 (2). pp. 65-80. DOI: https://doi.org/10.1016/0148-9062(82)91632-1