INVERTED INDEXING ON EDGE-NOTCHED CARDS.
Edge-notched cards in an inverted system of indexing may be used satisfactorily to analyze research data which concern a small series of individuals but a large number of highly variable characteristics in a short-term research project.
D000043:Abstracting and Indexing; D006801:Humans; D011642:Publications; D011676:Punched-Card Systems; D012106:Research; D012107:Research Design
ABSTRACTING AND INDEXING; PUNCHED-CARD SYSTEMS; RESEARCH