1. Nitrogenase activity associated with the rhizosphere of Ammophila arenaria L. and effect of inoculation of seedlings with Azotobacter;Abdel Wahab;New Phytologist,1980
2. N2-fixation by roots and rhizosphere of sand dune plants;Ahmad;Zeit fuer Pflanzenemaehrung und Bodenkunde,1978
3. Maps showing landforms of the Umpqua South area, Oregon Dunes National Recreation Area;Alpha,1980
4. Some factors affecting the growth of two populations of Festuca rubra var. arenaria on the dunes at Blakeney Point, Norfolk;Anderson,1979
5. Waterlogged soils;Armstrong,1975