@proceedings{coling-1969-international-linguistics-coling-1969-preprint-51,
    title = "{I}nternational {C}onference on {C}omputational {L}inguistics {COLING} 1969: Preprint No. 51",
    month = sep,
    year = "1969",
    address = {S{\r{a}}nga S{\"a}by, Sweden},
    url = "https://preview.aclanthology.org/fix-old-resolve/C69-5100/"
}
@inproceedings{yang-1969-search,
    title = "A Search Algorithm and Data Structure for an Efficient Information System",
    author = "Yang, Shou-chuan",
    booktitle = "{I}nternational {C}onference on {C}omputational {L}inguistics {COLING} 1969: Preprint No. 51",
    month = sep,
    year = "1969",
    address = {S{\r{a}}nga S{\"a}by, Sweden},
    url = "https://preview.aclanthology.org/fix-old-resolve/C69-5101/"
}