1. Amara, M., Z. J. Ordal and A. Touba: Sporulation requirements of Bacillus coagulans var. thermoacidurans in complex media. J. Bact. 72, 34 (1956).
2. Anagnostopoulos, C., and JohnSpizizen: Requirements for transformation in Bacillus subtilis. Amer. J. Bact. 81, 741 (1961).
3. Angus, T. A.: Separation of bacterial spores and parasporal bodies with a fluorocarbon. J. Insect. Path. (N.Y.) 1, 97 (1959).
4. Bacterial Anatomy: The University Press, Cambridge: Sixth Symposium of the Society for General Microbiology at the Royal Institution, London, 1956.
5. Badian, J.: Eine cytologische Untersuchung über das Chromatin und den Entwicklungszyklus der Bakterien. Arch. mikr Anat. 25, 261 (1933).