By Gilbert, William,.
Chicago Encyclopaedia Britannica 1952 .
xiii, 496 p. , 920616

By Galilei, Galileo,.
Evanston, Ill. Northwestern University Press 1950 .
xxi, 288 p. , "First published in 1914, reissued in 1933 by Macmillan. Reissued in 1939 by the Editorial Board of Northwestern University studies." | Includes reproduction of the original t.-p.: Discorsi e dimostrazioni matematiche, intorno à due nuoue scienze attenenti alla mecanica & i movimenti locali; del signor Galileo Galilei Linceo ... Con vna appendice del centro di grauità d'alcuni solidi. In Leida, appresso gli Elsevirii, M.D.C.XXXVIII. | This translation contains the dialogues of the first-fourth day, without the appendix. 24 cm..