Overhead transparencies to accompany Life : the science of biology, third edition [by] Purves, Orians and Heller.
Purves, William K.(William Kirkwood),1934-Life : the science of biology.3rd ed.
Orians, Gordon H.
Heller, H. Craig.
[Sunderland, Mass.] : Sinauer Associates ; [Salt Lake City, Utah] : W.H. Freeman,
c1992.