The Eye of Heaven: Ptolemy, Copernicus, Kepler.

New York: American Institute of Physics.

Gingerich, O. [2004]:

The Book Nobody Read.

London: Heinemann.

Greene, G. [2000]:

The Elegant Universe.

New York: Vintage Books.

Gutting, G.

ed . [1980]:

अज्ञात पृष्ठ