Quipuzco Ushñahua L, Baldeón Quispe W, Tang Cruz O. Quality assessment of biogas and biol from two cow manure mixtures in PVC tubular biodigesters. Rev. Inst. investig. Fac. minas metal cienc. geogr [Internet]. 2011 Jul. 15 [cited 2024 Jul. 18];14(27). Available from: https://revistasinvestigacion.unmsm.edu.pe/index.php/iigeo/article/view/690