TY  - BOOK
AU  - Verrinder,A.
TI  - Biology
U1  - 574.077 
PY  - 1966///
CY  - Oxford
PB  - Pergamon Press
KW  - Biology
KW  - Programmed instruction
KW  - Euglena
KW  - Paramecium
KW  - Microorganisms
N1  - Pergamon programmed texts
ER  -