Çetin, Naciye. Kolay Matematik : oynayalım-öğrenelim / by Naciye Çetin. - Istanbul : Morpa, 1998. - 88 p. : ill., col ; 28 cm. This book is in Turkish. ISBN: 9757069582 Subjects--Topical Terms: Colors--educational test.Concepts--educational test.Mathematics--educational test.