Clocks and rhythms /
Silverstein, Alvin.
Clocks and rhythms / Alvin Silverstein, Virginia Silverstein, Laura Silverstein Nunn. - Brookfield, Conn : Twenty-First Century Books, c1999. - 64 p. : ill. (some col.), map ; 26 cm. - Science concepts . - Silverstein, Alvin. Science concepts. .
Includes bibliographical references (p. 60) and index.
Discusses the concepts of time and biological cycles, including the phases of the moon and the internal clocks of plants and animals.
0761332243 : $24.90
98026058
Biological rhythms.
QH527 / .S45 1999
571.7/7
Clocks and rhythms / Alvin Silverstein, Virginia Silverstein, Laura Silverstein Nunn. - Brookfield, Conn : Twenty-First Century Books, c1999. - 64 p. : ill. (some col.), map ; 26 cm. - Science concepts . - Silverstein, Alvin. Science concepts. .
Includes bibliographical references (p. 60) and index.
Discusses the concepts of time and biological cycles, including the phases of the moon and the internal clocks of plants and animals.
0761332243 : $24.90
98026058
Biological rhythms.
QH527 / .S45 1999
571.7/7