@INBOOK {NG:1991, title = {Long-term seed conservation}, author = {Ng, N. Q. }, year = {1991}, type = {Crop genetic resources of Africa, Vol. 1, edited by F. Attere, H. Zedan, N.Q. Ng, and P. Perrino}, pages = {135--148}, publisher = {IBPGR, International Institute of Tropical Agriculture (IITA); UNEP}, address = {Italy; Ibadan, Nigeria}, note = {Part 3}, }