Bolshakova, I. “Cross-Disciplinary Integration of the Content of Education at Primary School (Analysis of Materials of Magazines «Radianska Shkola» and «Pochatkova Shkola» (Second Half of 1960-S – 1990-S)”. Pedagogical Discourse, no. 15, Oct. 2013, pp. 75-80, http://ojs.kgpa.km.ua/index.php/peddiscourse/article/view/596.