Rubuta ci gaba don wannan sakin layi - A cikin shekarun 1960, Jan Křen ya zama ɗaya daga cikin masana tarihin Czechoslovak na farko don yin rubuce-rubuce da bincike kan korar Jamusawa na Sudeten daga ƙasar a ƙarshen Yaƙin Duniya na II. Křen asali memba ne na Jam'iyyar Kwaminis ta Czechoslovakia daga 1949 zuwa 1969, amma an kore shi a 1970 saboda adawarsa ga mamayewar Yarjejeniyar Warsaw
Ka yi haƙuri. An kuma kore shi daga aikinsa na farfesa kuma aka tilasta masa ya yi aikin hannu.