TY  - BOOK
AU  - Heimler,Charles H.
AU  - J. David Lockard
TI  - Focus on life science: Por Charles H. Heimler 
SN  - 0675028094
U1  - 570 
PY  - 1981///
CY  - Columbus: 
PB  - Charles E. Merril
KW  - Biología
KW  - Animales
KW  - Ciencias de la vida
N1  - Science and living things.— Methods of science. — Cells and tissues. — Kinds of animals. — Animal structures. — Animal reproduction. — Animal behavior
ER  -