it is not censorship I did not tag the entire list as POV I think there should be an introduction and I suggested a manner that would allow this to happen Listing all the books you can find on the subject doesnt make an introduction You need to indicate the information from the books or otherwise they are references As discussed in the CfD History Jews and Chess and Chess in Jewish History and Hebrew Literature are both the same dissertation It should also be noted that Oxford Academia Publishers is clearly a dubious publisher It is a mistake to blend RS with questionable sources My objection to the use of extensively because there is not actually the evidence to support this as being extensive by scientific standards where you commonly get works with citations in the s and s