Factors which should determine the selection of an Anthelmintic in a geographical area.

Ohne Druckvermerk 1925. S. 408-453. 4° Orig.-Karton (Kante rissig, gelocht, Titelecke mit Widmung des Autors, 1926).
* Begins his text: "This report is based on experimental and field work carried out as part of the campaign against hookworm disease in Paraguay, conducted with the financial cooperation of the International Health Board and the Republic of Paraguay". - Fred Lowe Soper (Hutchinson, Kansas 1893 - Wichita, Kansas 1977). Fred Soper's best-known project was known as the Global Malaria Eradication Program at Brasil and Paraguay.