ONANUGA, P.A. 2020. Relative Effectiveness of Generative Learning Strategy on Students’ Academic Achievement in Senior Secondary School Biology: Sustainable Development Perspective. ГОДИШНИК НА ТЕХНИЧЕСКИ УНИВЕРСИТЕТ - ВАРНА. 4, 1 (Юни 2020), 12–22. DOI:https://doi.org/10.29114/ajtuv.vol4.iss1.134.