In sociology primary data is data you have collected yourself and secondary data is data you have gathered from primary sources to create new research. In terms of historical research, these two terms have different meanings.A primary source is a book or set of archival records.econdary data has already been collected by and readily available  from other sources. It is cheaper and easier to obtain than primary  data. It helps provide an understand â¦ ing of the problem and allows  for comparison of the primary data collected.
Mark Kelley, MD. Mark Kelley, MD practices as a Psychiatrist in Tulsa, OK.Mark Kelley, MD graduated from Univ Of Ok Coll Of Med, Oklahoma City Ok 73190.
NPI Number 1306825377 has the Individual type of ownership and has been registered to the following primary business legal name (which is a provider name or healthcare organization name) â MRS. MARY HEDGES LCSWC. Records indicate that the provider gender is Female. The enumeration date of this NPI Number is 01/10/2006. NPI Number information was last updated on 12/16/2013. The provider is physically located (Business Practice Location) at: 18714 N VILLAGE HAGERSTOWN, MD 21742-2454, US MRS. MARY HEDGES LCSWC can be reached at his practice location using the following numbers: