Československá hygiena 1959, 4(4-5):276-281

A hygienic and physiological evaluation of green blackboards in school

Vladimír Maňák

Keywords: child; school age; adolescent; schools; vision; school board; color; vision tests

Published: April 1, 1959  Show citation

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Maňák V. A hygienic and physiological evaluation of green blackboards in school. Československá hygiena. 1959;4(4-5):276-281.
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