Oosting, Henry J The study of plant communities : An introduction to plant ecology / by Henry J. Oosting - 2nd ed. - London : W.H.Freeman And Company , 1948 . - 440 p. Hard Back Subjects--Topical Terms: BotanyPlant communityVegetational analysisClimatic factorsPhysiographic factors Dewey Class. No.: 581.7 / HEN-S