1. Trans;ASBURY, T.;Amer. ophthal. Soc,1966
2. CAMPBELL, C. C. (1960) Ann. N%. Acad. Sci., 89, I63
3. "Histoplasmin sensitivity patterns around the world" in "Histoplasmosis;DAY, R.,1949
4. Amer;BILLINGS, E.L.;J. trop. Med. Hyg; Amer,1971
5. "Serological tests for histoplasmosis: their use and interpretation", in "Histoplasmosis;HILL, G.B.; CAMPBELL, C.C.,1962