1. Some factors influencing survival, growth and flowering of intraspecific and interspecific pine grafts;Ahlgren;J. Forest.,1962
2. Influence of the root system on height growth of three southern pines;Allen;Forest Sci.,1967
3. Introgressive hybridization;Anderson;Biol. Rev. Cambridge Phil. Soc.,1953
4. Anonymous. (1975). “Hessische Forstliche Versuchsanstalt, Jahresbericht 1974.” Hann.-Münden.
5. Evidence of hybridization between Pinus attenuata and P. radiata in New Zealand and variation in samples of two-year-old Pinus attenuata, P. radiata, and their hybrids;Bannister;Trans. Roy. Soc. N. Z.,1958