Acheson, Keith A. Techniques in the clinical supervision of teachers preservice and inservice applications Keith A. Acheson, Meredith Damien Gall. - New York Longman c1980. - xvi, 198 p. ill. Includes bibliographical references and index. ISBN: LCCN: 79017087 //r86 Subjects--Topical Terms: Student teachingTeachers' workshopsObservation Educational methodSchool supervisionTeachers--In-service training.