Hunger signs in crops : A symposium - S.A. Barber; S.W. Melsted John C. Cain Werner L. Nelson R.L Carolus E.R Purvis (New York David Mekay Company, 1951)
S.A. Barber; S.W. Melsted; John C. Cain; Werner L. Nelson; R.L Carolus & E.R Purvis: Hunger signs in crops : A symposium. (4 Revised Printing) New York. David Mekay Company, 1951.--(581.1BAR)
ENGLISH