PUCPR Search for 'an:66381'

Animals without backbones an introduction to the invertebrates.

By Buchsbaum, Ralph Morris.
Chicago University of Chicago Press 1948 .
xii, 405 p. 24 cm..

By Buchsbaum, Ralph Morris.
Garden City, N.Y. Doubleday 1960 .
303 p. , BIbliography: p. 291-292. 29 cm..

By Buchsbaum, Ralph Morris.
Pittsburgh Boxwood Press 1957 .
192 p. 23 cm..

By Buchsbaum, Ralph Morris.
Eugene Oregon State System of Higher Education 1955 .
x, 101 p. 26 cm..