Chlorophyll fluorescence characteristics, performance and survival of freshly lifted and cold stored Douglas fir seedlings Michael P. Perks, Suzanne Monaghan, Conor O'Reilly, Bruce A. Osborne and Derek T. MitchellAnn. For. Sci., 58 3 (2001) 225-235DOI: https://doi.org/10.1051/forest:2001122