Vockell, Edward L. <br/><br/>Educational Research  - London New York  Collier-Macmillan  ©1983  - 392 pages.,:  26 cm. <br/><br/><label>ISBN: </label>0024230707 <br/><br/><label>Subjects--Topical Terms: </label><br/>Educational Research<br/><br/><label>LC Class. No.: </label>LB1028  / .V852 1983