PUCHED CARD INFORMATION RETRIEVAL SYSTEM FOR AIR POLLUTION CONTROL DATA.
D000397:Air Pollution; D001699:Biometry; D002140:California; D003247:Conservation of Natural Resources; D016247:Information Storage and Retrieval; D007256:Information Systems; D011676:Punched-Card Systems; D013223:Statistics as Topic
AIR POLLUTION; CALIFORNIA; PUNCHED-CARD SYSTEMS; STATISTICS