TY - BOOK AU - Leedy,Paul D. AU - Newby,Timothy J. AU - Ertmer,Peggy A. TI - Practical research: planning and design SN - 0132414074 U1 - 001.4 LEE PY - 1997/// CY - Upper Saddle River, N.J. PB - Merrill KW - Research KW - Methodology N1 - Includes bibliographical references and index ER -