A Marginal-Dot System of Indexing Reference Cards
R. Weldon Larimore · Journal of Wildlife Management · 1957
money. The punch-card system of indexing by notching out combinations of holes in a prepunched card seems to fulfill these requirements. It can be used to index a wide variety of information (Casey and Perry, 1951), including vertebrate ecology (Adams, 1955). Many people have hesitated to use the punchcard system, or have tired of using it, because of the burden of handling every card in the file in order to select any one card. The effort seems especially excessive in selecting references to a particular author, for this system lacks the convenience of having all reference cards arranged alphabetically by authors, or requires additional coding and sorting to group the cards according to author