The physical effect of logging on salmon streams: a summary report covering a 5-year calibration period on four streams in southeast Alaska.

Cover title: The physical effect of logging on salmon streams of southeast Alaska.

Town improvement; a review of the principles by which physical improvement in the town or city may be accomplished, with observations as to the effect of such improvement upon the life of the community,

Mode of access: Internet.

Effect of physical factors in the ecology of certain insects in logs /

Thesis (Ph. D.)--University of Minnesota, 1921.

Effect of physical soil properties on cotton emergence : prediction and quantitative description / [by D. F. Wanjura].

"Agricultural Research Service ... in cooperation with Arizona and Texas Agricultural Experiment Stations."