POOR FAMERS´ PERCEIVED BENEFITS FROM DIFFERENT TYPES OF MAIZE GERMPLASM: THE CASE OF CREOLIZATION IN LOWLAND TROPICAL MEXICO / BELLON, Mauricio ; ADATO, Michelle ; BECERRIL, Javier ; MINDEK, Dubrauka .- Washington: American University , 2006 .- 1 vol; 16pp; 25cms .- ISSN 0305-750x.- Inglés