Asyrofi, Muhammad, Hari Sulistiyowati, & Retno Wimbaningrum. " Preliminary Assessment of The Population Structure and Habitat Characteristics of Javan Langur (Trachyphitecus auratus É. Geoffroy, 1812) in Natural Reserve Watangan Puger." Jurnal ILMU DASAR [Online], 23.1 (2022): 29-36. Web. 13 Aug. 2022