Halliday, Carol, Stimulating environments for children who are visually impaired/ by Carol Halliday and Ina W. Kurzhals ; with a foreword by Robert W. Bischoff. - Ill: Thomas : Springfield, 1976. - xvi, 142 pages : illustrations ; 24 cm. Includes indexes. Bibliography: pages 129-133. ISBN: 0398035113 Subjects--Topical Terms: Blind--Education.Outdoor education.Camps.