Webster, Reginald P. Sample Collection Method and Sequential Sampling Plan for Mites (Oligonychus ununquis) and Aphids (Cinaria laricifex) on Tamarack. Technical Note No. 278 / Reginald Webster. -- 1.vyd. -- Fredericton : Forestry Canada, 1993. -- 5 s.: 2 obr., 1 tab.
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