au.\*:("PERKINS RH")
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ESTIMATING SAWLOG CENTER OF GRAVITY BY EMPIRICAL FORMULAPERKINS RH.1982; FOR. PROD. J.; ISSN 0015-7473; USA; DA. 1982; VOL. 32; NO 3; PP. 50-53; BIBL. 9 REF.Article
PROCEDURE FOR ESTIMATING BUNCHING AND SWINGING DISTANCES IN ROADING OPERATIONSPERKINS RH; LYNN KD.1979; FOREST PROD. J.; USA; DA. 1979; VOL. 29; NO 3; PP. 19-23; BIBL. 5 REF.Article
DETERMINING AVERAGE SKIDDING DISTANCE ON ROUGH TERRAINPERKINS RH; LYNN KD.1979; J. FOREST.; USA; DA. 1979; VOL. 77; NO 2; PP. 84-88; BIBL. 2 REF.Article