New species of earthworm of genus Pheretima Kinberg, 1867 (Megascolecidae, Oligochaeta) belonging the bank of streams Xuannha Mocchau (Sonla province) and Dacno, Dacken (Daclac province). Tap Chi Sinh Hoc, 14(4), Thang 12 1992: 1-3, 11. 2 [Zoological Record Volume 130]