Alan R. Beals and John T. Hitchcock . Mary Jean Kennedy
National Academy of Sciences, National Research Council1960Field guide series
no. 4 , Publication / National Academy of Sciences, National Research Council
704
National Academy of Sciences, National Research Council1959Field guide series
no. 1 , Publication / National Academy of Sciences, National Research Council
701
National Academy of Sciences, National Research Council1959Field guide series
no. 2 , Publication / National Academy of Sciences, National Research Council
702
National Academy of Sciences, National Research Council1959Field guide series
no. 3 , Publication / National Academy of Sciences, National Research Council
716