Radiation biology - Hollaender, Alexander, 1898 - (McGraw-Hill, 1954)

Radiation biology; proceedings of the Second Australasian Conference on Radiation Biology held at the University, Melbourne, 15-18 December, 1958, by the Australian Radiation Society - Australian Radiation Society. (Academic Press, 1959)

Radioisotopes in biology and agriculture, principles and practice - Comar, C. L. (Cyril Lewis), 1914 - (McGraw-Hill, 1955)

Reading Naturalist. Reading - Reading Natural History Society.

Readings in evolution, genetics, and eugenics - Newman, Horatio Hackett, 1875 -1957 (University of Chicago Press, 1921)

Readings in evolution, genetics and eugenics - Newman, Horatio Hackett, 1875 -1957 (University of Chicago Press, 1921)

Readings in mammalogy / selected from the original literature and introduced with comments - Anderson, Sydney, 1927 -2018 (Museum of Natural History, University of Kansas, 1970)

Recent advances in cytology - Darlington, C. D. (Cyril Dean), 1903 - (P. Blakiston's son & co., inc, 1937)

Recent advances in entomology - Imms, A. D. (Augustus Daniel), 1880 -1949 (P. Blakiston's son & co., inc, 1937)

Recent advances in invertebrate physiology; a symposium sponsored by the National Science Foundation, the Tektronix Foundation [and] the University of Oregon - Scheer, Bradley T. (Bradley Titus), 1914 - (University of Oregon Publications, 1957)

Recent advances in microscopy; biological applications - MacBride, E. W. (Ernest William), 1866 -1940 (P. Blakiston's son & co., inc, 1931)

Recombinant DNA research : documents relating to "NIH guidelines for research involving recombinant DNA molecules" - National Institutes of Health (U.S.). Office of the Director. (U.S. Dept. of Health, Education, and Welfare, Public Health Service, National Institutes of Health, 1976)

Records of the Australian Museum - Australian Museum (Printed by order of the Trustees, 2009)

Records of the Australian Museum - Australian Museum (Printed by order of the Trustees, 2011)

Records of the Australian Museum - Australian Museum (Printed by order of the Trustees, 2015)

Regeneration and autotomy in the black widow spider, Latrodectus variolus Walckenaer - Randall, John Brookes, 1949 - (1979)

The relationship between insect mineral content and radiation sensitivity - Levy, Richard, 1944 - (1971)

Repertorium entomologicum - Deutsche Entomologische Gesellschaft. (Friedländer & Sohn, 1924)

Report - British Columbia Provincial Museum. (1917)

Report - British Columbia Provincial Museum. (Printed by W.H. Cullin, 1917)

Report for the year - British Columbia Provincial Museum - British Columbia Provincial Museum. (Printed by A. Sutton [etc.], for the Queen, 1917)

Report of the British Association for the Advancement of Science - British Association for the Advancement of Science. (1936)

Report of the British Association for the Advancement of Science - British Association for the Advancement of Science. (1937)

Report of the British Association for the Advancement of Science - British Association for the Advancement of Science. (1938)

Report of the Provincial Museum of Natural History - British Columbia Provincial Museum. (Provincial Museum, King's Printer for British Columbia, 1912)

Reproduction and chemical sterilization of the eye gnat, Hippelates pusio Loew - Schwartz, P. H. (Paul Henry), 1936 - (1964)

Research in progress - Howard Hughes Medical Institute. (The Institute, 1986)