Duffey, E. Grassland ecology and wildlife managmant / by Duffey, E. ; Morris, M.G. ; Sheail, J. ; Ward, Lena K. ; Wells, D.A. ; Wells, T.C.E. - London Chapman and Hall 1974 - xxi, 281p. ill. 24 plates. 24 cm. ISBN: 0412122901 Dewey Class. No.: 574.909 / GRA