Hoesin และ Maya F. (1989) The study on hookworm infestation after primary health care implementation at Pong village, Saema subdistrict, Soong Nern district, Nakhon Ratchasima, Thailand. Mahidol University,:ม.ป.ท.Hoesin และ Maya F. 1989. The study on hookworm infestation after primary health care implementation at Pong village, Saema subdistrict, Soong Nern district, Nakhon Ratchasima, Thailand. ม.ป.ท.:Mahidol University,;Hoesin และ Maya F. The study on hookworm infestation after primary health care implementation at Pong village, Saema subdistrict, Soong Nern district, Nakhon Ratchasima, Thailand. ม.ป.ท.:Mahidol University, 1989. Print.