1,961 Nurul Nadia Binti Ya'akob 2019-03-27 https://books.google.com.my/books?id=wZ3PUfcbkcEC&pg=PA108&lpg=PA108&dq=Glycine+max+%27Otootan%27+cultivars+crop+yield+in+t/ha&source=bl&ots=Hz_-UAo26J&sig=ACfU3U3oppP5m-QuOiqO13HlNrztesWR8Q&hl=en&sa=X&ved=2ahUKEwim66n9m6HhAhVBgI8KHY-4ChUQ6AEwAXoECAYQAQ#v=onepage&q=Glycine%20max%20'Otootan'%20cultivars%20crop%20yield%20in%20t%2Fha&f=false Shurtleff, W., & Aoyagi, A. (2009). History of Soybeans and Soyfoods in South America (1884-2009): Extensively Annotated Bibliography and Sourcebook. SoyInfo Center. Revised record 08.10.2019.