While doing a deeper literature search on the Tuli breed, I came across a video: Cattle Out of Africa (1990). It is very well done and includes interviews with the Australian scientists who collected the embryos in Zimbabwe and later produced Tulis in Australia, which were later compared to the performances of other breeds. Today the Tuli breed is credited for making a major impact on the Australian beef industry through its use in developing new composite breeds that are more heat and disease resistant. Here is the video link:https://www.youtube.com/watch?v=KKy0M0axO1I&feature=youtu.be. I have also added this link at the Purebred Reference Sires page in the Tuli breed section.