@article{wewest1954powder,
    author = "W. E. West, Jr.",
    title = "Powder River Basin, A Frontier: ABSTRACT",
    year = "1954",
    journal = "AAPG Bulletin",
    url = "https://doi.org/10.1306/5ceadf65-16bb-11d7-8645000102c1865d",
    doi = "10.1306/5ceadf65-16bb-11d7-8645000102c1865d",
    volume = "38"
}

@inproceedings{cobban1958late1,
    author = "Cobban, W. A",
    title = "Late Cretaecous fossil zones of the Powder River Basin, Wyoming and Montana, 13th Annual Field Conference Guidebook of Wyoming Geological Association",
    year = "1958",
    booktitle = "p.114-119",
    note = "talkorigins\_source = {true}; raw\_reference = {Cobban, W. A., 1958, Late Cretaecous fossil zones of the Powder River Basin, Wyoming and Montana, 13th Annual Field Conference Guidebook of Wyoming Geological Association: p.114-119.}"
}

@article{practitioners1980association,
    author = "of Bovine Practitioners, American Association",
    title = "Association of Bovine Practitioners 13th Annual Conference",
    year = "1980",
    journal = "The Bovine Practitioner",
    abstract = "Description program for the 13th Annual Convention American Association of Bovine Practitioners (1980) and information about officers, district news, events, awards, and other news.",
    url = "https://doi.org/10.21423/bovine-vol1980no15p201-223",
    doi = "10.21423/bovine-vol1980no15p201-223",
    pages = "201-223"
}

@misc{crossref1981kriging,
    title = "Kriging analysis of mean annual precipitation, Powder River Basin, Montana and Wyoming",
    year = "1981",
    url = "https://doi.org/10.3133/wri8050",
    doi = "10.3133/wri8050"
}

@article{crossref1986northwestern,
    title = "Northwestern University's 13th Annual Ethnographic Field School",
    year = "1986",
    journal = "Anthropology News",
    url = "https://doi.org/10.1111/an.1986.27.2.20.3",
    doi = "10.1111/an.1986.27.2.20.3",
    number = "2",
    pages = "20-20",
    volume = "27"
}

@article{lylebgallivan1986candy,
    author = "Lyle B. Gallivan, Sidney C. Bjorlie",
    title = "Candy Draw: Significant New Minnelusa Field, Powder River Basin, Wyoming: ABSTRACT",
    year = "1986",
    journal = "AAPG Bulletin",
    url = "https://doi.org/10.1306/94886768-1704-11d7-8645000102c1865d",
    doi = "10.1306/94886768-1704-11d7-8645000102c1865d",
    volume = "70"
}

@article{kooyman199113th,
    author = "Kooyman, Patricia",
    title = "13th annual meeting of the British Zeolite Association",
    year = "1991",
    journal = "Applied Catalysis",
    url = "https://doi.org/10.1016/s0166-9834(00)82765-7",
    doi = "10.1016/s0166-9834(00)82765-7",
    number = "2",
    pages = "N26-N27",
    volume = "66"
}

@article{crossref1999the,
    title = "The history and practice of ancient astronomy",
    year = "1999",
    journal = "Choice Reviews Online",
    url = "https://doi.org/10.5860/choice.37-0906",
    doi = "10.5860/choice.37-0906",
    number = "02",
    pages = "37-0906-37-0906",
    volume = "37"
}

@article{robinson200113th,
    author = "Robinson, Art",
    title = "13th annual meeting of the als users' association",
    year = "2001",
    journal = "Synchrotron Radiation News",
    url = "https://doi.org/10.1080/08940880108261122",
    doi = "10.1080/08940880108261122",
    number = "1",
    pages = "13-16",
    volume = "14"
}

@misc{skone2011powder,
    author = "Skone, Timothy",
    title = "Powder River Basin Coal, Extraction",
    year = "2011",
    url = "https://doi.org/10.2172/1509320",
    doi = "10.2172/1509320"
}

@incollection{foxNonepowder,
    author = "Fox, James E. and Dolton, Gordon L. and Clayton, Jerry L.",
    title = "Powder River basin",
    year = "None",
    booktitle = "Economic Geology, U.S.",
    url = "https://doi.org/10.1130/dnag-gna-p2.373",
    doi = "10.1130/dnag-gna-p2.373",
    pages = "373-390"
}