TY - BOOK TI - Hunger signs in crops; a symposium U1 - 632.121(082.2) K4 PY - 1951/// CY - New York PB - David Mckay KW - S.A.Barber (and others) KW - Barber, S.A. KW - Nutrition-Research,Defeciency diseases in plants,Field Crops ER -