found: His Poučení z exilu, 1952:t.p. (Otakar Machotka)
found: Mezi domovem a exilem, 2001:t.p. (Otakar Machotka) p. 3 (Otakar Richard Machotka; b. 1899) p. 7 (d. 1970)
found: LC data base, 2002-07-31(hdg.: Machotka, Otakar, 1899-)
found: A contribution to the theory of culture change, 1959:leaf 333 (Otakar Machotka, Harpur College)
found: Wikipedie, otevřená encyklopedie, October 18, 2016:Otakar Machotka page (Otakar Machotka; born 29 November 1899 in Prague; died 29 July 1970 in Endicott, New York; Czechoslovak sociologist, politician, and participant in anti-Nazi resistance activities during World War II; professor of sociology at Univerzita Karlova; emigrated from Czechoslovakia in 1948; became professor of sociology at Harpur College; also a leading member of Council of Free Czechoslovakia) - https://cs.wikipedia.org/wiki/Otakar_Machotka