DAVID, D., JAWAN, R., MARBAWI, H. and GANSAU, J.A. 2015. Organic Additives Improves the in Vitro Growth of Native Orchid Vanda helvola Blume. Notulae Scientia Biologicae. 7, 2 (Jun. 2015), 192–197. DOI:https://doi.org/10.15835/nsb729546.