Talk in English, by TCA Venkatesan https://srivaishnava.bandcamp.com/track/ramanuja-vaibhavam-english
Yatiraja Vimshati Text
Manavala Mamunigal’s Yatiraja VimshatiText in 9 languages http://acharya.org/sloka/mamunigal/yv-l.html
Origin and Growth of Sri Brahmatantra Parakala Mutt
1949 Book in English by N Desikacharya Swami http://acharya.org/bk/pb/nd/oagbpm.pdf
History of Srivaishnavas
1917 Booklet in English by T A Gopinatha Rao http://acharya.org/bk/bl/tagr/hosv.pdf
Yatiraja Vimshati Vyakhyanam
Commentary in Manipravalam by Pillaillokam Jeeyar http://acharya.org/bk/pb/plj/yvv1884.pdf