(2) FOX, J. E. D.: Dipterocarp seedling behavior in Sabah. Forester 36: 205-214, 1973
(3) HETT, J. M.: A dynamic analysis of age in sugar maple seedlings. J. Ecol. 59: 507-520, 1971
(4) HETT, J. M. and LOUKS, O. L.: A pplication of lifetable analyses to tree seedlings in Quetico provincial park, Ontario. For. Chron. 44: 29-32, 1968