@article{el gaddal_1989, title={Control of schistosomiasis in the Gezira}, volume={84}, ISSN={0074-0276}, url={https://doi.org/10.1590/S0074-02761989000500012}, DOI={10.1590/S0074-02761989000500012}, journal={Memórias do Instituto Oswaldo Cruz}, publisher={Instituto Oswaldo Cruz, Ministério da Saúde}, author={El Gaddal, A. A.}, year={1989}, pages={117–123} }