George douglas eighth duke of argyll

Mode of access: Internet.

Water-resources of western Douglas County, Oregon /

Mode of access: Internet.

Larval instars of the Douglas-fir tussock moth /

Issued Sept. 1978.

Rearing the Douglas-fir tussock moth /

Combined forest pest research and development program.

Journal kept by David Douglas during his travels in North America 1823-1827, together with a particular description of thirty-three species of American oaks and eighteen species of Pinus, with appendices containing a list of the plants introduced by Douglas and an account of his death in 1834. Published under the direction of the Royal Horticultural Society.

Mode of access: Internet.

Repeated manual release in a young plantation : effect on Douglas-fir seedlings, hardwoods, shrubs, forbs, and grasses /

Includes bibliographical references (p. 11).

Change of grade and volume of Douglas-Fir shop and better lumber during Kiln Drying /

Mode of access: Internet.