Distributions of literatures cited within the paper published in J. Colloid Interface Sci. (Vol. 69, No. 1 and Vol. 71, No. 1, 1979) were examined for thirty research papers. The format of this journal is recommended as Introduction, Materials and Methods. Results, Discussion, Summary, Acknowledgements, and References. About fourty five percent of literatures was cited in Introduction. The major sources of literatures were an original research papers (〜77%) and books (〜15%), classified as primary literature. Possibilities of the literatures cited in Introduction, as an useful information sources, was discussed in this paper.
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