By Hillman Graham R.   Takyi Sam K.   in Northern Journal of Applied Forestry

ISSN:0742-6348|15|2|98-105

Society of American Foresters‎(1998)‎

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By Takyi Sam K.   Hillman Graham R.   in Northern Journal of Applied Forestry

ISSN:0742-6348|17|2|71-79

Society of American Foresters‎(2000)‎

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By Hillman Graham R   Feng Joseph C   Feng Cecilia C   Wang Yonghe   in Canadian Journal of Fisheries and Aquatic Sciences

ISSN:1205-7533|61|8|1447-1460

NRC Research Press‎(2004)‎

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