S. Bariddah, S. Nasution, and S. Nedi, “POPULATION DENSITY AND LENGHT-WEIGHT REALTIONSHIP IN MANGROVE GASTROPOD Cerihidea cingulata AND Littoraria scabra OF PANGKALAN SESAI VILLAGE, DUMAI CITY”, ajoas, vol. 3, no. 3, pp. 193-201, Dec. 2020.