TY  - BOOK
TI  - Holt science & technology. Cells, heredity, and classification
SN  - 0030647770
U1  - 500 A47C 
PY  - 2002///
CY  - Texas
PB  - A Harcourt Classroom Company
KW  - CIENCIAS NATURALES
KW  - BIOLOGÍA
KW  - CITOLOGÍA
ER  -