@article{59247,
      recid = {59247},
      author = {Bullough, William Sydney,},
      title = {Vertebrate reproductive cycles.},
      publisher = {Methuen;},
      address = {London,},
      pages = {123 p.},
      year = {1961},
      note = {First published in 1951 under title: Vertebrate sexual  cycles.},
      url = {http://library.usi.edu/record/59247},
}