?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.aulast=Brown&rft.aufirst=W.J.&rft.au=Brown%2C+W.J.&rft.title=Are+mothers+of+young+children+really+inactive%3F&rft.date=2001&rft.genre=proceeding