1. Abo El-Nil, M. and Wochok, Z.S. (1986) ‘Seed weight and in vitro bud induction potential in Pseudotsuga menziesii cotyledons cultured in vitro’, N.Z.J. For. Sci. 16, 283–288.
2. Ahuja, M.B. (1989) ‘Storage of forest tree germplasm at sub-zero temperatures’, in V. Dhawan (ed.), Applications of Biotechnology in Forestry and Horticulture, Plenum Press, New York and London, pp. 216–228.
3. Aitken-Christie, J. and Thorpe, T.A. (1984) ‘Clonal propagation’, Gymnosperms, in Cell Culture and Somatic Cell Genetics of Plants, Vol. 1,1.K. Vasil (ed.), Academic Press, Inc., Orlando, Florida, pp. 82–95.
4. Aitken-Christie, J. and Jones, C. (1987) ‘Towards automation: radiata pine shoot hedges in vitro’, Plant Cell Tissue and Organ Culture 8, 185–196.
5. Aitken-Christie, J. and Singh, A.P. (1987) ‘Cold storage of tissue cultures’, in J.M. Bonga and D.J. Durzan (eds.), Cell and Tissue Culture in Forestry, Vol. 2, Martinus Nijhoff Publishers, The Netherlands, pp. 285–304.