The AC Martin Partners drawings and records on microfilm document the significant role this prominent, multi-generational firm has played in shaping the built environment of Southern California throughout the last 100 years. The records consist predominantly of aperture cards mounted with microfilmed copies of over 67,000 architectural drawings, technical plans, and site surveys for civic, commercial, and residential projects predominantly in the greater Los Angeles area. These aperture cards are supported by microfilmed copies of project documentation for several early projects, and a selection of the professional correspondence of Albert C. Martin Senior.