@article{54920,
      author = {Downs, Lloyd Eugene.},
      url = {http://library.usi.edu/record/54920},
      title = {Laboratory embryology of the frog.},
      publisher = {Wm. C. Brown},
      recid = {54920},
      pages = {42 .},
      address = {Dubuque, Iowa,},
      year = {1968},
}