Elements of Set Theory
https://mohammadtolouei.com/wp-content/themes/movedo/images/empty/thumbnail.jpg
150
150
modir
https://secure.gravatar.com/avatar/99ff5e3094a05d5b8536a22a5f02b276b03e3f84763f3d9ce2e4944646548a54?s=96&d=mm&r=g
Enderton, H. B. Elements of Set Theory, 2nd edition, ACADEMIC Press, Inc., 1977.- ISBN 7-238440-12-0