370.78 A <a id="rdfa" resource="" property="dc:creator" href="http://viaf.org/viaf/94641776" target="_new">Abelson, Harold Herbert, 1904- </a> The art of educational research; its problems and procedure. Yonkers-On-Hudson, World Book co., 1933. xi, 332 p. diagrs. 21 cm. Incluye bibliografía. 1. Educación. I. Educational research, The art of, II. Titulo. <a id= "rdfa" about="http://bnjm.sld.cu/cgi-bin/item.py?idficha=bcuhcgrlyfof0010095" property = "oa:link" href="http://www.worldcat.org/oclc/ 580044544 ">WorldCat</a>