192 Thik Sukree 2016-07-12 https://www.doc-developpement-durable.org/file/Fertilisation-des-Terres-et-des-Sols/agroforestrie/principes/LOST%20CROPS%20Of%20AFRICA%20Volume%20I%20Grains.pdf National Research Council. (1996). Lost crops of Africa: volume I: grains (pp. 44). National Academies Press. Revised record 30.8.2019