Interpretive science and related information in vocational agriculture; effective utilization of scientific principles and related information in organized agricultural instruction. - Ross, W. Arthur (Washington, U.S. Govt. print. off., 1936)
"Prepared under the direction of J.A. Linke, chief, agricultural education service, United States Office of education, by W.A. Ross, subject-matter specialist in agricultural education. -Foreword.
Keywords: Agricultural education; Agriculture -- Study and teaching