The publication has a 1986 copyright. Each descendant is coded alphanumerically to convey their relationship from one their progenitors<ref>A more precise explanation of the system can be located on page 9 in the preface.</ref>, along with gender, marriage, and other information when known. | The publication has a 1986 copyright. Each descendant is coded alphanumerically to convey their relationship from one their progenitors<ref>A more precise explanation of the system can be located on page 9 in the preface.</ref>, along with gender, marriage, and other information when known. |