Ekpo, J. and Ansa, E. E. (1991). Remedial science students’ understanding of selected chemistry concepts during their post-primary school science program. School Science XXIX (3). 1-9
Ekpo, J. and Ansa, E. E. (1991). Remedial science students’ understanding of selected chemistry concepts during their post-primary school science program. School Science XXIX (3). 1-9