Brown, Lester Russell
Seeds of change the green revolution and development in the 1970's / Lester R. Brown; foreword by Eugene R. Black .-- New York : Praeger , 1972
.--XV, 205 p. 20 cm.
Black, Eugene Robert
Seeds of change the green revolution and development in the 1970's / Lester R. Brown; foreword by Eugene R. Black .-- New York : Praeger , 1972
.--XV, 205 p. 20 cm.
Black, Eugene Robert