TY  - GEN
AU  - Hummer, Paul J. ... [et al.].
TI  - Probing levels of life: a laboratory manual 
SN  - 067570279
U1  - 577  
PY  - 1983///
CY  - Toronto : 
PB  - Charles Merrill E
KW  - Nature of life
KW  - Manual
N1  - Includes bibliographical references and index
ER  -