De Donald H. Menzel. Harvard University Press, 1953, 320 p.

De Harold T. Wilkins. The Citadel Press, 1955, 256 p.

De Truman Bethurum. DeVorss and Co., 1954, 192 p.

De Waveney Girvan. Frederick Muller Limited, 1955, 160 p.

De Cedric Allingham. Frederick Muller Limited, 1954, 144 p.

De M. K. Jessup. The Citadel Press, 1955, 240 p.

De Malcolm Lambert. Blackwell Publishers, 1998, 344 p.

De Rupert T. Gould. Methuen and Co. Ltd, 1937, 182 p.