opracowanie "Lasy Państwowe w liczbach 2004"
wersja polska, tabelka na str.8
http://www.lp.gov.pl/media/biblioteka/Lasy w liczbach pol.pd...

i wersja angielska:
http://www.lp.gov.pl/media/biblioteka/in_english/state_fores...

... Improved material is likely to emerge from seedling seed orchards or as vegetatively
propagated clones or mixtures from this programme, and Tree Improvement ...
www.forestresearch.gov.uk/website/forestresearch.nsf/ByUniq...

... Forward selection plus trees selected for seedling seed orchards or mass vegetative
propagation. How can these approaches be enhanced now and in the future by: ...
www.frcc.forestry.gov.uk/website/oldsite.nsf/byunique/GGAE-...