How many people (Jews, Non-Jews, etc.) died in concentration camps during the Holocaust in WWII?

This article is full of statistics -- but doesn't differentiate between concentration camp deaths and Holocaust deaths that occured elsewhere.

http://en.wikipedia.org/wiki/The_Holocaust#Victims_and_death_toll

The estimated number of people who died in concentration camps during the Holocaust in World War II is around six million. However, it's important to note that this number is an approximation and the exact count may never be known due to the destruction and chaos of that time.

To find this information, you can start by conducting a search on reliable sources such as historical records, academic articles, and reputable Holocaust research organizations. Some recommended sources include the United States Holocaust Memorial Museum, Yad Vashem, and various scholarly publications on the subject.

These sources provide comprehensive studies, data, and testimonies from survivors, historians, and researchers, helping to gain an understanding of the scope and magnitude of the Holocaust. Additionally, many of these organizations have publicly accessible archives and resources that provide detailed information about the victims, including demographics and causes of death.

It's important to critically evaluate the sources you come across, ensuring that they are based on factual evidence and have been subject to peer review or are from reputable institutions. This way, you can obtain accurate and reliable information about the number of people who tragically lost their lives during the Holocaust.