I have found the entire book online, but I looked through it and found each of the excerpts we read for class. For the most part, A in the reader refers to a piece pulled from section one on this book, B refers to a piece from section two, and so on.
https://terebess.hu/english/chuangtzu.htmlÂ
I can go through and pull these sections out and put them here if you would like.