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.
Having more than 27 years of diverse experiences, especially in INFECTIOUS DISEASE, Dr. Janak Koirala affiliates with many hospitals including Memorial Medical Center, St Johns Hospital, Decatur Memorial Hospital, Taylorville Memorial Hospital, Sarah D Culbertson Memorial Hospital, and cooperates with other doctors and specialists in medical group Siu Physicians And Surgeons, Inc. Call Dr. Janak Koirala on phone number (217) 545-9537 for more information and advice or to book an appointment.