By Raymond Chris   in Journal of Forestry

ISSN:0022-1201|88|10|37-40

Society of American Foresters‎(1990)‎

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By Raymond Chris   Tighe Susan   Haas Ralph   Rothenburg Leo   in Canadian Journal of Civil Engineering

ISSN:1208-6029|30|4|637-643

NRC Research Press‎(2003)‎

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