Norman P. Worthington

Labor requirements in thinning

Labor requirements in thinning Douglas-fir and western hemlock on two experimental forests in western Washington

1966

Economic considerations in management of Douglas-fir growing stock

1964

Light thinning of Douglas-fir does not stimulate regeneration

1964

Thirteen years of thinning in a Douglas-fir woodland

1963

Red alder

1962

Cost of thinning 50-year-old D

Cost of thinning 50-year-old Douglas-fir for pulpwood at Voight Creek experimental forest

1961

Normal yield tables for red alder

1960

Silvical characteristics of red alder

1957