TY  - BOOK
AU  - Silverstein,Alvin
AU  - Slverstein,Virginia B.
AU  - Nunn,Laura Silverstein
TI  - Clocks and rhythms
T2  - Science concepts
SN  - 0761332243 :
AV  - QH527 .S45 1999
U1  - 571.7/7 21
PY  - 1999///
CY  - Brookfield, Conn
PB  - Twenty-First Century Books
KW  - Biological rhythms
KW  - Sears
N1  - Includes bibliographical references (p. 60) and index
N2  - Discusses the concepts of time and biological cycles, including the phases of the moon and the internal clocks of plants and animals
ER  -