@misc{Boltnev_A._I._Maternal_2001,
 author={Boltnev, A. I. and York, A. E.},
 volume={254},
 copyright={Rights Reserved - Restricted Access},
 journal={Journal of Zoology, Lond.},
 address={London},
 howpublished={online},
 year={2001},
 publisher={Wiley-Blackwell},
 language={eng},
 type={Text},
 title={Maternal investmen in northern fur seals ( Callorhinus ursinus ): interrelationships among mothers' age, size, parturition date, offspring size and sex rations},
 keywords={Age, Callorhinus ursinus, Fur seals, Northern fur seals, Size},
}