Zacharos K, Kilia M, Ravanis K. Familiarizing pupils 4-6 years old with forms of spatial representation. The use of photography as an auxiliary tool. JSSR [Internet]. 2014 May 28 [cited 2024 Apr. 27];4(1):454-63. Available from: https://rajpub.com/index.php/jssr/article/view/3233