00801nam a22001937a 4500003000900000005001700009008004100026040003300067041000800100082001600108100002100124245012100145260005900266490005900325504005100384650005500435650007400490710004300564BD-DhIDS20260903123159.0260903b1964     ii||||| |||| 00| 0 eng d  aBD-DhIDScBD-DhIDSdBD-DhIDS  aEng  a630.7bAERC1 aRobertson, C. A.00aEffectiveness of crop demonstrations :ba study of wheat demonstrations in Aligarh district, U.P. /cC. A. Robertson  aDelhi :bAgricultural Economics Research Centre,c19640 aIntensive Agricultural District Programme Studies No.1  aIncludes bibliographical references and index.04aAgriculture & researchxCrop demonstrationszIndia04aAgricultural extensionxWheatzAligarh District, Uttar Pradesh, India1 aAgricultural Economics Research Centre