00470nam a2200169Ia 4500 190328s9999||||xx |||||||||||||| ||und|| 69-12349 0-85229-155-8 NITIL NITIL 21st 505.8 B862B Benton, William Britanica yearbook of science and the future William Benton Chicago Encyclopaedia Britannica 1971 448p. Science-Periodicals BKS 35150 35150