Websites that I've used:
The Jewish Virtual Library
This website is valid and credible as it as ".org" There are hyperlinks and to which works and have references in each page.
Eye Witness to History
This website what's in the Inside of a Nazi Death Camp. A deeper look on the perspective of who was in the camp. Though it's a .com it usually don’t give you all of the information but it does give you something.
Yadvashem
This is a credible website because it is a .org and there is references to the author.
Website #1 has a list of all of the major concentration camps. A death (or mass murder) camp is a concentration camp with special apparatus specifically designed for systematic murder. Six such camps existed: Auschwitz-Birkenau, Belzec, Chelmno, Majdanek, Sobibor and Treblinka. All were located in Poland. Concentration camps are series of developments over time - from 1933 to 1936, and they were used for imprisoning political adversaries, trade unionists, political dissidents, communists, and others. In World War II brought changes in the concentration camp system. There was an increase in the number of prisoners, extension of the network of concentration camps in and outside Germany, and an alteration in the camps' function.
Website #2 consists of what's inside a Nazi Death Camp. It also stated some information in website number one said; "The system grew to include about 100 camps divided into two types: concentration camps for slave labor in nearby factories and death camps for the systematic extermination of "undesirables" including Jews, Gypsies, homosexuals, the mentally retarded and others."
Website #3 talks about the same information on number 1; what is a concentration camp and what it's designed to do. It also talked about Chelmno, it was the first extermination camp that the Germans established in Poland. Murder operations began there on December 8, 1941, and continued intermittently until January 1945. The text also talked about how the extermination of the Jews. "A standard method of extermination was used in these three camps: carbon monoxide from large tank engines was released into sealed chambers. The victims were stripped of their clothing and crowded into the gas chambers where they died of suffocation within a short time. The corpses were removed by Jewish slave laborers and thrown into large pits. The corpses were later burned in an attempt to destroy any evidence left behind. The entire process of murder took only a few hours and the camps would process and murder numerous transports in the same day" (Website #3).
Website #2 consists of what's inside a Nazi Death Camp. It also stated some information in website number one said; "The system grew to include about 100 camps divided into two types: concentration camps for slave labor in nearby factories and death camps for the systematic extermination of "undesirables" including Jews, Gypsies, homosexuals, the mentally retarded and others."
Website #3 talks about the same information on number 1; what is a concentration camp and what it's designed to do. It also talked about Chelmno, it was the first extermination camp that the Germans established in Poland. Murder operations began there on December 8, 1941, and continued intermittently until January 1945. The text also talked about how the extermination of the Jews. "A standard method of extermination was used in these three camps: carbon monoxide from large tank engines was released into sealed chambers. The victims were stripped of their clothing and crowded into the gas chambers where they died of suffocation within a short time. The corpses were removed by Jewish slave laborers and thrown into large pits. The corpses were later burned in an attempt to destroy any evidence left behind. The entire process of murder took only a few hours and the camps would process and murder numerous transports in the same day" (Website #3).