found: His Landet väster om floden, 1949.
found: His Guía de los mamíferos argentinos, 1981:t.p. (C.C. Olrog)
found: Dir. de científicos e inst. de Argentina, 1966:(Olrog, C. C., 1912)
found: OCLC, June 23, 2014(access point: Olrog, C. C., 1912- ; usage: C.C. Olrog; Claës Chr. Olrog; C. Chr. Olrog)
found: SORA website, June 23, 2014(C.C. Olrog; b. 1912; In memoriam: Claes Christian Olrog, 1912-1985; in 1985 we lost one of the more important pioneers in neotropical ornithology: Claes Olrog; over 100 articles and books in six languages)