Terms for subject Historical containing half- in

English	Russian
in over a half-century	за последние пятьдесят лет (Alex_Odeychuk)
in over a half-century	за последние полвека (Alex_Odeychuk)
in the first half of the 20th century	в первой половине XX века (Alex_Odeychuk)
in the latter half of the 1980s	во второй половине 1980-х гг. (Alex_Odeychuk)
in the second half of the 20th century	во второй половине XX века (Alex_Odeychuk)