@article{Rushton_1983, title={An analysis of variation of leaf characters in Quercus robur L. and Quercus petraea (Matt.) Liebl. population samples from Northern Ireland.}, url={https://journal.societyofirishforesters.ie/index.php/forestry/article/view/9532}, journal={Irish Forestry}, author={Rushton, B.S.}, year={1983}, month={Nov.}