41. Education manual EM (series). 146. Guide to language development, instructor's manual, for use with EM 143, EM 144, and EM 145, grade levels 4, 5, and 6; by James B. Burr, Lowry W. Harding. Bookmark Corporate/Agency Authors: Defense Department Publisher: Defense Department Date: [1950.] SuDoc number: D 1.10:146