https://kutuphane.turvak.com/cgi-bin/koha/opac-search.pl?q=ccl=au%3A%22Kaufmann%2C%20William%20J.%22&sort_by=relevance&format=rss 2 0 50 ISBN: https://kutuphane.turvak.com/cgi-bin/koha/opac-detail.pl?biblionumber=104 By Kaufmann, William J..
İstanbul Sarmal Yayınevi 1994 .
160 s. , astronomi, kozmoloji, rölativite, çekim kuramı, kara delik, evren, felsefe 25 cm..

]]> https://kutuphane.turvak.com/cgi-bin/koha/opac-detail.pl?biblionumber=104 ISBN: https://kutuphane.turvak.com/cgi-bin/koha/opac-detail.pl?biblionumber=125 By Kaufmann, William J..
Ankara Arkadaş kitabevi 1979 .
192 s. , doğa, bilim, astronomi, evren, evrim, yıldızlar, süpernovalar, kara delikler

]]> https://kutuphane.turvak.com/cgi-bin/koha/opac-detail.pl?biblionumber=125