https://kutuphane.turvak.com/cgi-bin/koha/opac-search.pl?q=ccl=au%3A%22%C3%A7ev.%20Osman%20Bahad%C4%B1r%22&sort_by=relevance&format=rss 2 0 50 ISBN: https://kutuphane.turvak.com/cgi-bin/koha/opac-detail.pl?biblionumber=70 By Boslough, John.
İstanbul Sarmal .
113 s. , astronomi, uzay, evren | özgün adı; Stephen Hawking"s Universe : An introduction to the most remarkable scientist of our time 25 cm..

]]> https://kutuphane.turvak.com/cgi-bin/koha/opac-detail.pl?biblionumber=70 ISBN: https://kutuphane.turvak.com/cgi-bin/koha/opac-detail.pl?biblionumber=95040 By Arnold, David.
İstanbul Alan Yayıncılık 1995 .
98 s. , Tarih, Coğrafi Keşifler, David Arnold, Coğrafi Keşifler Tarihi, keşif 19,5 cm..

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