APA

Luhrs D., . (1937). Observations on the rio puerco of the east. Nuevo Mexico-US: School of american research.

Chicago

Luhrs D.L, . 1937. Observations on the rio puerco of the east. Nuevo Mexico-US: School of american research.

Harvard

Luhrs D., . (1937). Observations on the rio puerco of the east. Nuevo Mexico-US: School of american research.

MLA

Luhrs D.L, . Observations on the rio puerco of the east. Nuevo Mexico-US: School of american research. 1937.