Kuwornu, J. K. M.; Narh JNR, A. B.; Egyir, I. S.; Onumah, E. E.; Gebrezgabher, S. Willingness to Pay for Excreta Pellet Fertilizer: Empirical Evidence from Ghana. aas 2017, 109 (2), 315–323. https://doi.org/10.14720/aas.2017.109.2.14.