TY  - BOOK
AU  - Denlinger, David L
AU  - Nelson, Randy Joe
AU  - Somers, David E
TI  - Photoperiodism : the biological calendar
SN  - 9780195335903
SN  - 200804191
U1  - 612.022 NEL 
PY  - 2010///
CY  - Oxford
PB  - Oxford University Press
KW  - Biological Clocks - genetics
KW  - Biological Clocks - physiology
KW  - Photoperiod
KW  - Photoperiodism
N1  - Includes bibliographical references and index
ER  -