au.\*:("POWELSON RL")
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A TEMPERATURE GRADIENT PLATE DESIGNED TO FUNCTION NEAR AND BELOW 0OC = PLAQUE A GRADATION DE TEMPERATURE DESTINEE A FONCTIONNER AU VOISINAGE ET AU-DESSOUS DE 0OCROWE RC; POWELSON RL.1973; PHYTOPATHOLOGY; U.S.A.; DA. 1973; VOL. 63; NO 2; PP. 287-288; BIBL. 8 REF.Serial Issue
