@article{201702.0018, doi = {10.20944/preprints201702.0018.v1}, url = {https://doi.org/10.20944/preprints201702.0018.v1}, year = 2017, month = {February}, publisher = {Preprints}, author = {Jacob Filgona and Joel Filgona and Linus, K. Sababa}, title = {Mastery Learning Strategy and Learning Retention: Effects on Senior Secondary School Students’ Achievement in Physical Geography in Ganye Educational Zone, Nigeria}, journal = {Preprints} }