Dela Pena et al., 2013. Eur. Scient. J., special ed., 4: 465-468

Dela Pena, C.; Leah, I. B.; Tules, P. B., 2013. The potential of Tithonia diversifolia  (wild sunflower) as organic foliar fertilizer. Eur. Scient. J., special ed., 4: 465-468