Nitrogen fixation in bacteria and higher plants / R. C. Burns, R. W. F. Hardy ; with 27 figures. Burns, Richard C., 1930- Hardy, Ralph W. F., 1934- joint author. Nitrogen Fixation. Nitrogen-fixing plants. QR89.7 .B87 547.44 BUN Includes bibliographical references and index. Berlin ; New York : Springer-Verlag, 1975. 1975. 1975 Text x, 189 p. : eng Molecular biology, biochemistry, and biophysics ; 21