Books by Paul Slud
The birds of Hacienda Palo Verde, Guanacaste, Costa Rica
Geographic and climatic relationships of avifaunas with special reference to comparative distribution in the neotropics
The birds of Cocos Island, (Co
The birds of Cocos Island, (Costa Rica)
The birds of Costa Rica
The birds of Finca "La Selva,"
The birds of Finca "La Selva," Costa Rica