"0, . "
"seminar on the development of science & mathematics concepts: in young children in african countries,nairobi,sept.17-27/ " - ed. - nairobi : unesco-unicef 1974. - ", 95p.; 30 cm."
"science-handbooks,manuals etc--mathematics-handbooks,manuals"
510. 054 096
"seminar on the development of science & mathematics concepts: in young children in african countries,nairobi,sept.17-27/ " - ed. - nairobi : unesco-unicef 1974. - ", 95p.; 30 cm."
"science-handbooks,manuals etc--mathematics-handbooks,manuals"
510. 054 096