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period

A Dictionary of Biology | 2004 | Â© A Dictionary of Biology 2004, originally published by Oxford University Press 2004. (Hide copyright information) Copyright

period See menstrual cycle.

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"period." A Dictionary of Biology. 2004. Encyclopedia.com. 26 Dec. 2009 <http://www.encyclopedia.com>.

"period." A Dictionary of Biology. 2004. Encyclopedia.com. (December 26, 2009). http://www.encyclopedia.com/doc/1O6-period.html

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