A model for objective presentation of the rentgen ray, as a factor of the health and ecological education

Katsarov, V., Beltcheva, Y., Marinov, S., & Marinov, I. (). A model for objective presentation of the rentgen ray, as a factor of the health and ecological education. Scientific researches of the Union of scientists in Bulgaria - Plovdiv. Series B; Scientific researches of the Union of scientists in Bulgaria - Plovdiv. Series B.