Bruce, D., & Cowlin, R. W. (1968). Timber measurement problems in the Douglas-fir region of Washington and Oregon. Pacific Northwest Forest and Range Experiment Station.
Cita Chicago Style (17a ed.)Bruce, David, y Robert W. Cowlin. Timber Measurement Problems in the Douglas-fir Region of Washington and Oregon. [Portland, Or.]: Pacific Northwest Forest and Range Experiment Station, 1968.
Cita MLA (8a ed.)Bruce, David, y Robert W. Cowlin. Timber Measurement Problems in the Douglas-fir Region of Washington and Oregon. Pacific Northwest Forest and Range Experiment Station, 1968.
Precaución: Estas citas no son 100% exactas.