Help needed for m113 study
 

I am attempting to determine the release dates of the Baseball Magazine m113 posters using ads from the magazine. I have already found discrepancies between the ads and the catalog listed dates, probably the most notable being that all the 1910 releases were actually done in 1909.

I currently have scans of 160 ads and using them have pinpointed the release dates of 63 supplements, narrowed down to within a few month those of 20 more, and have no idea about another 8 of them.

I am missing the following issues needed for the study :
1909 Sep
1910 Jan, Mar, May, Jun, Nov, Dec
1911 Feb, Mar, May, Jun, Jul, Aug, Oct, Dec
1912 Mar
1913 Mar, Apr, Jul, Sep
1914 Mar, May, Jun, Sep
1915 Feb, May, Aug, Dec
1916 Jan, Mar, Aug, Sep, Dec
1917 Feb, Dec
1918 Apr, Oct, Nov, Dec

If anybody has access to any of those issues, I would be interested in buying / trading for them, or at the very least getting scans / pix of the poster advertisements (many issues have more than one ad).

Thanks in advance for any help provided,
Doug


PS - anything I learn will be freely distributed to anybody who cares to know. I may put together some sort of pdf pamphlet after I finish.