@string{ jan = {Jan.}}
@string{ feb = {Feb.}}
@string{ mar = {Mar.}}
@string{ apr = {Apr.}}
@string{ jun = {Jun.}}
@string{ jul = {Jul.}}
@string{ aug = {Aug.}}
@string{ sep = {Sep.}}
@string{ oct = {Oct.}}
@string{ nov = {Nov.}}
@string{ dec = {Dec.}}

@article{Ayala1,
 author   ={F. J. Ayala},
 title    ={Evolution of fitness},
 volume   =53,
 number   =6,
 pages    ={883-895},
 journal  ={Genetics},
 year     =1966}
@article{Ayala2,
 author   ={F. J. Ayala},
 title    ={Evolution of fitness {II}},
 volume   =53,
 number   =7,
 pages    ={1-3},
 journal  ={Genetics},
 year     =1966}

@book{Crane,
 author   ={D. Crane},
 title    ={Invisible colleges},
 publisher={Univ.\ of Chicago Press},
 address  ={Chicago},
 year     ={1972}}
@article{Stieg,
 author   ={Stieg, M. F.},
 title    ={The information needs of historians},
 journal  ={College and Research Libraries},
 month    =nov,
 year     =1981,
 number   =6,
 volume   =42,
 pages    ={549-560}}
@inproceedings{Burchard,
 author   ={J. E. Burchard},
 title    ={How humanists use a library},
 booktitle={Intrex: report of a planning conference on information transfer experiments},
 year     ={1965},
 conference-year={Sept. 3, 1965},
 address={Cambridge, Mass.},
 publisher={M.I.T. Press}}