The elements of astronomy :
Fath, Edward Arthur, 1880
The elements of astronomy : A non-mathematical textbook for use as an introduction to the subject in colleges, universities, etc., and for the general reader / Edward Arthur Fath. - 5th ed. - New York : McGraw-Hill, 1955. - 369 p. ill.
Աստղագիտություն
The elements of astronomy : A non-mathematical textbook for use as an introduction to the subject in colleges, universities, etc., and for the general reader / Edward Arthur Fath. - 5th ed. - New York : McGraw-Hill, 1955. - 369 p. ill.
Աստղագիտություն