Sproule, Anna. Thomas A. Edison / by Anna Sproule. - Ankara : Ilkkaynak, 1996. - 64 p. : col., ill ; 22 cm. - Bilime yön verenler . - Bilime yön verenler . This book is in Turkish. ISBN: 9758030043 Subjects--Personal Names: Edison, Thomas Alva, 1847-1931 --Biography.