This is the largest series in the collection. The series is broken down into six subseries. All of the subseries contain information of biographical nature in the form of correspondence, legal documents, memorabilia, and memorials and dedications. The largest subseries within this series is subseries c, which contains all of the various printed materials and newspaper clippings collected by Alberto Regina pertaining to his life and work in the YMCA. Also of importance are the legal documents, including an identify card for the Argentine Olympic Committee, his marriage certificate and his death certificate. There are also three scrapbooks in this series that contain pictures of him, the Buenos Aires YMCA, and his YMCA classes. Some of the pictures were used in the newspaper articles contained in the collection.