INTERREGINAL COMPETION IN AGRICULTURE:
MIGHELL ,RONALD, L. RONALD ,L MIGHELL AND JOHN ,D,BLACK.
INTERREGINAL COMPETION IN AGRICULTURE: WITH SPECIAL REFERENCE TO DAIRY FARMING IN THE LAKE STATES AND NEW ENGLAND: - MASSACHUSETTS, HARVARD UNIVERSITY PRESS: 1951.
637 MIG
INTERREGINAL COMPETION IN AGRICULTURE: WITH SPECIAL REFERENCE TO DAIRY FARMING IN THE LAKE STATES AND NEW ENGLAND: - MASSACHUSETTS, HARVARD UNIVERSITY PRESS: 1951.
637 MIG