TY - BOOK AU - Gregor,Howard F. TI - Geography of agriculture: themes in research T2 - Prentice-Hall foundations of economic geography series SN - 013-351320-3 AV - S439 .G74 1970 U1 - 333.7/6 PY - 1970/// CY - Englewood Cliffs, N.J PB - Prentice-Hall KW - Agricultural geography N1 - Includes bibliographical references ER -