Analysis of information sources in references of the Wikipedia article "An Eye for an Eye (Sack book)" in English language version.
A report written by the Soviet NKVD General Nikołaj Seliwanowski dated 20 October 1945 stated that 18,7% of the field operatives in the Ministry of Public Security (Poland) were Jewish, including 50% of its departmental directors. Notably, all directors of the critical Department One were Jewish with no exception. Szwagrzyk himself used the existing records declassified after the collapse of the Soviet empire to estimate that in 1944-54 the real percentage of Jewish directors was 37.1% decreasing to 34.5% in 1954-56, before the end of Stalinism in Poland. – Szwagrzyk, p. 59.
A report written by the Soviet NKVD General Nikołaj Seliwanowski dated 20 October 1945 stated that 18,7% of the field operatives in the Ministry of Public Security (Poland) were Jewish, including 50% of its departmental directors. Notably, all directors of the critical Department One were Jewish with no exception. Szwagrzyk himself used the existing records declassified after the collapse of the Soviet empire to estimate that in 1944-54 the real percentage of Jewish directors was 37.1% decreasing to 34.5% in 1954-56, before the end of Stalinism in Poland. – Szwagrzyk, p. 59.