JF Ptak Science Books Reference Tools
Earlier in this blog I posted a great graph on the publications on relativity from 1896 to 1924 as published in Maurice Lecat's Bibliographie de la Relativité, suivie d'un appendice sur les déterminants à deux dimensions, le calcul des variations, les séries trigonométriques, et l'azéotropisme (published in Bruxelles by Lamertin in 1924). Preceding that graph are a few tables of interesting bits on the history of relativity. though I can say that there aren't too many surprises--the information is still very interesting. The Physical Review does not make the top-14 list (in the middle table). [Also see here for a good summation of a 1921 bibliography of relativity.]
The second set of tables shows the distribution by nationality of the contributor--it is interesting to note that the Americans made up 11% of the authors while the Physical Review came nowhere close to that percentage, meaning that the PR hadn't yet come to its place of high regard as a premium publishing vehicle, though that would come soon enough, particularly by the early 1930's.