Enrollment cards, also referred to as “census cards,” were prepared by the staff of the Commission to the Five Civilized Tribes, commonly known as the Dawes Commission. The cards record information provided by applications submitted by members of the same family group or household and include notations of the actions taken. Information for each applicant includes name, age, sex, degree of Indian blood, relationship to the head of the family group, parents' names, and references to enrollment on earlier rolls used by the Commission for verification of eligibility.
The descriptive pamphlet, published by NARA, for publication M1186, is available as a PDF here. Much of the information on this page is taken directly from that publication.