There are also directories for professional groups which list members (i.e. medical, law, etc.) and may assist in locating an individual in a particular place/time and may include biographical details.
Professional directories are generally arranged by state.
Many university alumni groups, churches/religious groups, schools, and numerous other organizations have produced directories of their memberships over the years. These directories are highly specialized and are suited to the interests of their particular profession or organization.
To locate professional or organizational directories in the Library's collections: