Seed fall in an old-growth northern hardwood forest
By: Raymond E. Graber, William B. Leak
Contributors: Leak, William B., author; Northeastern Forest Experiment Station (Radnor, Pa.); United States. Forest Service
Series: Research paper NE -- 663; Research paper NE (Broomall, Pa. : 1988) -- 663
Publisher: United States Department of Agriculture, Forest Service, Northeastern Forest Experiment Station
Published: 1992
Place of publication: Radnor, Pennsylvania
Language: eng
Number of pages: 11
Subjects: Forest regeneration; Beech; Seeds; Viability; Maple; Birch
Notes: Title from title screen (viewed on July 18, 2013).

"July 1992."

Includes bibliographical references (pages 10-11).