Ralph Waldo Emerson. Ralph waldo Emerson Ralph Waldo Emerson / Ralph Waldo Emerson : by Ralph Waldo Emerson. 爱默生(Ralph Waldo Emerson)著 by Ralph Waldo and Emerson. (美)爱默生(Ralph Waldo Emerson)著 Ralph Waldo Emerson: Lecture Memoir of Ralph Waldo Emerson