Zacharos, K., Kilia, M. and Ravanis, K. 2014. Familiarizing pupils 4-6 years old with forms of spatial representation. The use of photography as an auxiliary tool. JOURNAL OF SOCIAL SCIENCE RESEARCH. 4, 1 (May 2014), 454–463. DOI:https://doi.org/10.24297/jssr.v4i1.3233.