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Donald McEwan Alexander worked at CSIRO Merbein as a Senior Research Scientist for almost 40 years and is now retired. He published many papers, reports and booklets related to grape vines, citrus and avocados. During the 1970s he led a program introducing various new crops and new varieties into Australia, including avocado, mango, cashew, custard apple, Chinese date and others. William J. Lewis was formerly a Senior Technical Officer with CSIRO Plant Industry Horticulture Unit at Merbein, Victoria. For over 20 years he grew and grafted many different fruit and nut trees for research projects.