TY  - BOOK
AU  - Aschoff, J..
TI  - Vertebrate Circadian systems: Structure and Physiology / 
SN  - 0-387-11664-8
U1  - K9:3 
PY  - 1980///
CY  - New york : 
PB  - Springer-Verlag , 
KW  - Zoology <Vertebrate>
ER  -