cpb-us-w2.wpmucdn.com...Gupta, 1987), Norway spruce (Picea abies (L.) karst) (Hakman and von Arnold,...
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cpb-us-w2.wpmucdn.com...Gupta, 1987), Norway spruce (Picea abies (L.) karst) (Hakman and von Arnold, 1985), and both black spruce regeneration from somatic embryos of some conifers