378
T.J.B. Boyle
Welsh, D.A. 1988. Meeting habitat needs of non-game forest wildife. For Chron ,
64, 262-266.
Welsh , D .A. 1991. Managing forested land for the conservation of biological
diversity and the production of timber. Internation Association of Landscape
Ecologists' Conference, Ottawa , ON (unpub!. abstract) .
Welsh , D.A. , and Fillman , D.R. 1980. The impact of forest cutting on boreal bird
populations. Am Birds , 34, 84-94.
Winchester , N. 1993. Coastal Sitka spruce canopies: Conservation of biodiversity.
Bioline Fall, 1993.
Wood , G.W. 1991. Owl conservation strategy flawed. J For, 89(2), 39-42.
World Commission on Environment and Development (WCED). 1987. Our
common future . Oxford , England: Oxford University Press.
World Conservation Union. 1990. A framework for the classification of terrestrial
and marine protected areas . Switzerland: Gland.
World Conservation Union, United Nations Environment Programme, and
World-wide fund for Nature. 1991. Caring for the Earth. Gland, Switzerland:
World Conservation Union.
World Resources Institute, World Conservation Union , and United Nations
Environment Programme. 1991. The Global Biodiversity Strategy. Washington,
DC: World Resource Institute.
Yeh , F.C. , and El-Kas saby , Y.A. 1980. Enzyme variation in natural populations
of Sitka spruce (Picea sitchensis). I. Genetic variation patterns among trees
from 10 IUFRO provenances. Can J For Res, 10, 415-422.
T.J.B. Boyle
Welsh, D.A. 1988. Meeting habitat needs of non-game forest wildife. For Chron ,
64, 262-266.
Welsh , D .A. 1991. Managing forested land for the conservation of biological
diversity and the production of timber. Internation Association of Landscape
Ecologists' Conference, Ottawa , ON (unpub!. abstract) .
Welsh , D.A. , and Fillman , D.R. 1980. The impact of forest cutting on boreal bird
populations. Am Birds , 34, 84-94.
Winchester , N. 1993. Coastal Sitka spruce canopies: Conservation of biodiversity.
Bioline Fall, 1993.
Wood , G.W. 1991. Owl conservation strategy flawed. J For, 89(2), 39-42.
World Commission on Environment and Development (WCED). 1987. Our
common future . Oxford , England: Oxford University Press.
World Conservation Union. 1990. A framework for the classification of terrestrial
and marine protected areas . Switzerland: Gland.
World Conservation Union, United Nations Environment Programme, and
World-wide fund for Nature. 1991. Caring for the Earth. Gland, Switzerland:
World Conservation Union.
World Resources Institute, World Conservation Union , and United Nations
Environment Programme. 1991. The Global Biodiversity Strategy. Washington,
DC: World Resource Institute.
Yeh , F.C. , and El-Kas saby , Y.A. 1980. Enzyme variation in natural populations
of Sitka spruce (Picea sitchensis). I. Genetic variation patterns among trees
from 10 IUFRO provenances. Can J For Res, 10, 415-422.
