Many U.S. architects are not AIA members and do not show up in Profile . Society of Architectural Historians. Membership Directory . The Society, 1990. Rotch collects these rosters very selectively.
Many states sell their lists at a cost per name.
Since many architects register to do work in states in which they do not live, these lists may be very long and costly and have relatively few residents. Therefore, many of the rosters are not purchased. Some state periodicals, such as Texas Architect , publish their lists of architects in an annual issue. Rosters for foreign countries are also collected selectively. Substantive directories are fully cataloged, others are simply filed.