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[2]
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[3]
Herlin AH, 1997, SWED J AGR RES, V27, P189
[4]
JENSEN P, 1988, SWED J AGR RES, V18, P141
[7]
OERTLI B, 1995, KTBL SCHRIFT, V370, P118
[8]
[No title captured]
[9]
[No title captured]