General proceedings : 28th International Geological Congress : Washington, D.C. USA, July 9-19, 1989 / / prepared by Bruce B. Hanshaw.
Reston : [b.w.], 1990.
101 s. : fot., il. ; 28 cm.
Z.110077
UKD: 55(061)=111
General proceedings : 28th International Geological Congress : Washington, D.C. USA, July 9-19, 1989 / / prepared by Bruce B. Hanshaw.
Reston : [b.w.], 1990.
101 s. : fot., il. ; 28 cm.
Z.110077
UKD: 55(061)=111