Spicer counts 138 brown priests (109 German diocesan, 19 from religious orders, and 10 non-German diocesan). During those years there were about 27.000 diocesan and more than 15.000 religious priests in Germany. According to Spicer, "I have made every attempt to find and identify brown priests. Of course, I am positive that I have failed to unearth the names of some of them. I will have to leave these priests for future scholars to uncover. In other cases I have left out priests' names because sufficient evidence does not exist to determine their relationship with the NSDAP". Spicer's list is based on his own research, checked against the extant membership cards and personal files of the NDSAP and its organizations in the archives once housed at the Berlin Document Center, extant in the German Federal Archives in Berlin-Lichterfelde and the U.S. National Archives in College Park, Maryland.