1. An ultrastructural study of primordial germ cells, oogonia and early oocytes in Xenopus laevis;Al-Mukhta;J. Embryol. Exp. Morphol,1971
2. The biogenesis of mitochondria;Ashwell;Annu. Rev. Biochem,1970
3. Origin and differentiation of cytoplasmic structures in the oocytes of Xenopus laevis;Balinsky;Acta Embryol. Morphol. Exp,1963
4. Evidence for the presence of deoxyribonucleic acid in the organelles of the egg cells of Pteridium aquilinum;Bell;J. Mol. Biol,1964
5. Transfer of primordial germ cells in Xenopus laevis;Blackler;J. Embryol. Exp. Morphol,1961