MadinaP., and OgahJ. J. “PRODUCTIVITY OF LIVING STONE POTATO (Plectranthus Esculentus L.) AS INFLUENCED BY ROW SPACING AND NUTRIENT SOURCES IN BILLIRI, GOMBE STATE, NIGERIA”. FUDMA JOURNAL OF SCIENCES, Vol. 3, no. 2, Apr. 2023, pp. 39 -51, https://fjs.fudutsinma.edu.ng/index.php/fjs/article/view/1479.