TY  - BOOK
AU  -  Willan, R.L.
AU  -  Olesen, Kirsten.
AU  -  Barner, H.
ED  -  DANIDA Forest Seed Centre.
TI  -  Natural variation as a basis for tree improvement
PY  - 1989///
CY  -  Copenhagen
PB  -  Danida Forest Seed Centre
KW  -  Forests and forestry
KW  -  Tree breeding
ER  -