Garrison, Philip E (1908) The Prevalence and Distribution of the Animal Parasites of Man in the Phil. Islands, with a Consideration of Other Possible Influence upon Public Health. The Philippine Journal of Science, 3 (B). pp. 191-210.
Phalen, JM and Nichols, Henry J (1908) Notes on the condition of the liver in schistosomiasis. Philippine Journal of Science, 3. p. 223.