M. Z. Alam Parvin Sultana Yousuf Mian Emdadul Haque Counterpart Personnel (Sudan)4 Yousif Mohamed Ahmad Salah Hassan Ali Obeid Awad El Kariem El Safi Mohamed El Mahadi Ahmad Abo El Rahman Ismail El Hag Khier El Seed Ali Abdel Halim Awad Moustafa Mahmoud Babiker A. Ali Abdel Latif Zarrough El Sadig Awad Beshir Counterpart Personnel (Philippines)4 Aurora K. Ammayao1 Edwin A. Benigno Jose C. Castillo Melanda M. Hoque Justiniano L. Libay1 Jaime L. Olvidal Danilo C. Sanchez Fernando F. Sanchez Jesus P. Sumangil Cooperators, Participants, Daniel B. Jayasingh J. Fernando Londono Danilo Valencia G. Pedro Aguilar F. Alberto Fernandez B. Daniel Evans Marcos Pefa F. John D. Axtell Martin L. Price Richard A. Creelman J. 0. York Enrique Sanchez and Graduate Students5 Jamaica Colombia Colombia Peru Venezuela Dominican Republic Dominican Republic Purdue University Purdue University Texas A&M University University of Arkansas Nicaragua (Banal adesh )4 Counterpart Personnel