Research procedures and genealogical sources are different for each area and time period and are affected by the local customs and traditions. Those that might affect your research strategies include mortality rate, life spans, apprenticeship customs, and courting and marriage customs that affected the birth rates. | Research procedures and genealogical sources are different for each area and time period and are affected by the local customs and traditions. Those that might affect your research strategies include mortality rate, life spans, apprenticeship customs, and courting and marriage customs that affected the birth rates. |