Richard Landwehr has been the author of numerous books about the Waffen-SS, its foreign (that is, non-German) volunteers in particular. He has been putting out a magazine called "Siegrunen" on that topic "[f]or more than 25 years". His work has been published in the Journal for Historical Review (JHR), published by the Institute for Historical Review. The Institute has been accused of Holocaust denial. Wikipedia
The definitive Wikipedia entry for Richard Landwehr. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/Richard_Landwehr