International Geological Congress,, 23,
Geology of pre-cambrian : report of the twenty-third session - Czechoslovakia, 1968 / proceedings of section 4 [of] XXIII International Geological Congress
Geology of pre-cambrian : report of the twenty-third session - Czechoslovakia, 1968 / proceedings of section 4 [of] XXIII International Geological Congress
. - Prague : Academia, 1968
. - 298 p. : il. 24 cm
55