by F.C. Hummel in consultation with H.A. Hilmi

Food and Agriculture Organization of the United Nations 1989 FAO forestry paper 92

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edited by F.C. Hummel, W. Palz and G. Grassi

Elsevier Applied Science , Sole distributor in the USA and Canada, Elsevier Science Pub. Co. 1988 Third EC biomass development programme . Energy from biomass ; 3

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edited by F.C. Hummel

M. Nijhoff/W. Junk , Distributors for the U.S. and Canada, Kluwer Boston c1984 Forestry sciences v. 12

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edited by F.C. Hummel

M. Nijhoff/W. Junk 1984 Forestry sciences v. 12

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by F. C. Hummel and A. J. Grayson

Forestry Commission 1962

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by F.C. Hummel

H. M. S. O. 1955 Bulletin / Forestry Commission no. 24

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