A. L. Graham. 2003. Effects of snail size and age upon the prevalence and intensity of avian schistosome infection: Relating lab to field studies. J Parasitol 89: 458-63. Link »
A. L. Graham. 2003. Effects of snail size and age upon the prevalence and intensity of avian schistosome infection: Relating lab to field studies. J Parasitol 89: 458-63. Link »