DAVID, Devina, Roslina JAWAN, Hartinie MARBAWI, and Jualang Azlan GANSAU. 2015. “Organic Additives Improves the in Vitro Growth of Native Orchid Vanda Helvola Blume”. Notulae Scientia Biologicae 7 (2):192-97. https://doi.org/10.15835/nsb729546.