Media type: E-Article Title: Promotion of seed production in Douglas-fir grafts by girdling + gibberellin A4/7 stem injection, and effect of retreatment Contributor: Ross, Stephen D.; Bower, Ralph C. Published: Springer Science and Business Media LLC, 1991 Published in: New Forests, 5 (1991) 1, Seite 23-34 Language: English DOI: 10.1007/bf00037548 ISSN: 0169-4286; 1573-5095 Keywords: Forestry Origination: Footnote: