A study of possible uses of migratory birds in germ warfare was funded through Camp Detrick for years using the Smithsonian as a cover. Government documents have linked the Smithsonian to the CIA's mind control program known as MKULTRA. The CIA were interested in bird migration patterns for CBW research under MKULTRA where, a Subproject 139 designated "Bird Disease Studies" at Penn State. An agents purchase of a copy of the book "Birds of Britain, Europe," is recorded as part of what was described in a financial accounting of the MKULTRA program as a continuous project on bird survey in special areas. Sampling of native migratory organisms with a focus on birds provided to researchers the natural habitat of disease causing fungus, viruses, and bacteria as well as the established (or potential) vectors for them. The sampling also provided exotic tropical viruses and toxins from the various organisms collected on both land and sea. The studies, including the Pacific Ocean Biological Survey Program (POBSP) were conducted by the Smithsonian Institution and Project SHAD crews on Pacific islands and atolls. The "bird cruises" were subsequently found to be a U.S. Army cover for the prelude to chemical, biological, and entomological warfare experiments related to Deseret Test Center, Project 112, and Project SHAD.