Galilei, Galileo, 1564-1642.
Random Haouse , 1957
Buku Teks
Speyer, Edward, author
John Wiley & Sons, 1994
Buku Teks
Clark, Wilfrid E. Le Gros, author
Holt, Rinehart and Winston, 1967
Buku Teks
Marpaung, B.K.
[publisher not identified], 1954
Buku Teks
Muhammad Ilham, author
2000
UI - Skripsi (Membership)