APA

Longo L. D., Bartels H. (. & International Congress of Physiological Sciences (25th : 1971 : Munich G. (19721973). Respiratory gas exchange and blood flow in the placenta. Bethesda, MD: National Institute of Child Health and Human Development; [for sale by the Supt. of Docs., U.S. Govt. Print. Off., Washington].

Chicago

Longo Lawrence D, Bartels H (Heinz) and International Congress of Physiological Sciences (25th : 1971 : Munich Germany). 19721973. Respiratory gas exchange and blood flow in the placenta. Bethesda, MD: National Institute of Child Health and Human Development; [for sale by the Supt. of Docs., U.S. Govt. Print. Off., Washington].

Harvard

Longo L. D., Bartels H. (. and International Congress of Physiological Sciences (25th : 1971 : Munich G. (19721973). Respiratory gas exchange and blood flow in the placenta. Bethesda, MD: National Institute of Child Health and Human Development; [for sale by the Supt. of Docs., U.S. Govt. Print. Off., Washington].

MLA

Longo Lawrence D, Bartels H (Heinz) and International Congress of Physiological Sciences (25th : 1971 : Munich Germany). Respiratory gas exchange and blood flow in the placenta. Bethesda, MD: National Institute of Child Health and Human Development; [for sale by the Supt. of Docs., U.S. Govt. Print. Off., Washington]. 19721973.