%A International Congress of Plant Tissue and Cell Culture %A Thorpe, Trevor A. %T Frontiers of plant tissue culture 1978 : proceedings of the 4th International Congress of Plant Tissue and Cell Culture held at the University of Calgary, Alberta, Canada, August 20-25, 1978 %I International Association for Plant Tissue Culture %D 1978 %U http://ci.nii.ac.jp/ncid/BA14733014