Dissertations, Academic (Ph.D) 20 Thesis (Ph.D)-Education 20 History 13 Biotechnology 6 Agriculture 4 Dissertations, Academic(Ph.D) 4 Horticultural Crops, (New March 2000) 4 Women 4 Avocados 3 Children 3 Community Science 3 Customary law 3 Education, Secondary 3 Farming 3 Fermentation 3 Fruits 3 Genetic Engineering, Gene Transfer and Transgenics, (New June 2002) 3 Literary History; English Literature 3 Multimedia systems in education 3 Persea americana 3 Persia 3 Pest control 3 Plant Breeding and Genetics 3 Plant Pests, (New March 2000) 3 Plant Production 3 Plant pests 3 Religion 3 Thesis(Ph.D)-Education 3 Transgenic plants 3 Adolescent psychology 2