1. A tlas E stadistico de C osta R ica 1953 Casa Grafica Ltda. San José
2. The ecological regulation of species diversity;Connell;Am. Nat.,1964
3. Annotated list of birds of Barro Colorado Island, Panama Canal Zone.;Eisenmann;Smithson. Misc. Colls,1952
4. The species of Middle American birds.;Eisenmann;Trans. Linn. Soc. N.Y.,1955
5. Eisenmann , E. Loftin , H. 1967 Field check list of the birds of the Panama Canal Zone Area. Fla. Audubon Society. Maitland, Fla