613.2 B Black, John Donald, 1883- Future food and agriculture policy, a program for the next ten years, by John Donald Black and Maxine Enlow Kiefer. 1st ed. New York, McGraw-Hill, 1948. viii, 348 p. diagrs. mapas. 24 cm <a id= "rdfa" about="http://bnjm.sld.cu/cgi-bin/item.py?idficha=bcuhcgrlyfof0220017" property = "oa:link" href="http://www.worldcat.org/oclc/502805669 ">WorldCat</a>