APA

Richards O. W., . (1966). On a collection of Sphaeroceridae (Diptera) from the Galapagos Islands. : .

Chicago

Richards O W, . 1966. On a collection of Sphaeroceridae (Diptera) from the Galapagos Islands. : .

Harvard

Richards O. W., . (1966). On a collection of Sphaeroceridae (Diptera) from the Galapagos Islands. : .

MLA

Richards O W, . On a collection of Sphaeroceridae (Diptera) from the Galapagos Islands. : . 1966.