Amparado, Edna, AND 		Jacinto, Sonia.
" Notochord in <i>Tilapia nilotica</i> Exposed to Sublethal Dose of Malathion, S[1, 2-Di(Ethoxycarbonyl)Ethyl] Dimethyl Phosphorothiolothionate" <em>Science Diliman: A Journal of Pure and Applied Sciences</em> [Online], Volume 4 Number 1 (16 October 2007)