Hirschfeld, Gerhard
The people growth and survival... / Gerhard Hirschfeld; foreword by Kenneth Ewart Boulding .-- Chicago : Aldine Publishing Co , 1973
.--239 p. 21 cm
Boulding, Kenneth Ewart
The people growth and survival... / Gerhard Hirschfeld; foreword by Kenneth Ewart Boulding .-- Chicago : Aldine Publishing Co , 1973
.--239 p. 21 cm
Boulding, Kenneth Ewart