I'm not sure if anyone realized this yet, so I don't mean to sound like I am mindlessly complaining if that were the case. However, I was taking a look at the YMAA Newsletter Archives. Apparently issues number 14 and 17 merely link to JPEG images instead of prerequisite PDF files.
I hope that bit of information helps out whoever is maintaining the archive. I would also really like to extend my thanks for this, as I find there to be quite a wealth of information in Dr. Yang's commentary provided in these publications.