1. Allen, T.C. (1972). Bacilliform particles within asters infected with a western strain of aster yellows. Virology 47,491–3.
2. Allen, T.C., Stevens, J.O., Florance, E.R. and Hampton, R.O. (1970). Ultra- structure of Mycoplasma gallisepticum isolate 1056. Journal of Ultra structural Research 33.318–31.
3. Anderson, D.R. (1969). Ultrastructural studies of mycoplasmas and the L-phase of bacteria. In The Mycoplasinatales and the L-phase of Bacteria, pp. 365–402, L. Hayflick Jr. (ed). New York: Appleton-Century-Crofts.
4. Anderson, D.R. and Barile, M.F. (1965). Ultrastructure of Mycoplasma hominis. Journal of Bacteriology 90,180–92.
5. Beakbane, A.B., Mishra, M.D., Posnette, A.F. and Slater, C.H.W. (1971). Myco- plasma-like organisms associated with chat fruit and rubbery wood diseases of apple, Malus domestica Borkh, compared with those in strawberry with green petal disease. Journal of General Microbiology 66,55–62.