The audio link to the 54th part of the lecture by Adiyen on Sri Ramanuja’s bhashya on the Bhagavad Gita is as below – The introduction to the 15th chapter and the meaning of its 1st verse was revised and the meanings of the verses until the 10th of the 15th chapter are all are covered in this lecture.
The link is as below:
https://drive.google.com/open?id=1wBHJjVwp-WvVIqwCGc-LCwNeY3pMVDVm
regards
Dasan
Sreeram