A manual for forest tree seed orchard management in the Maritimes / by J.D. Simpson and R.F. Smith.

by Simpson, John Dale, 1955-
Fredericton, N.B. : Maritimes Forest Research Centre, 1988.

Series: Information report M-X ; M-X-167

A list of seed at the National Tree Seed Centre / by J.D. Simpson and B.I. Daigle = Liste des semences au Centre national de semences forestières / par J.D. Simpson and B.I. Daigle...

by Simpson, John Dale, 1955-
Fredericton, N.B. : Atlantic Forestry Centre = Centre de foresterie de l'Atlantique, c1998.

Series: Information report (Atlantic Forestry Centre) ; M-X-203E/F.