TY JOUR TI Property differentiation of the Cossack estate of the Yakut region in the second half of the XIX – early XX centuries KW Yakut Cossacks KW Cossack teams KW Cossack estate KW Cossack farms KW social differentiation KW economic specialization KW land use KW lease relations KW hiring of labor JO Ojkumena. Regional Researches AU Chertkov, A.S. PY 2025 IS 19 PB Vladivostok State University