https://openlibrary.org/books/OL23134008M/Chen_style_taijiquan
Chen style taijiquan by David Gaffney | Open Library
Chen style taijiquan by David Gaffney, Davidine Sim, David Gaffney, 2001, North Atlantic Books edition, in English
chen style taijiquandavid gaffneyopenlibrary
https://www.ctn.academy/
Chen-Style Taijiquan Network Online Academy
Chen Style Taijiquan Network Academy. Online learning. Tai-chi-chuan / Taijiquan
chen style taijiquannetwork onlineacademy