Vincent van Gogh, Anthon Gerhard Alexander Rappard (ridder van), Anthon van Rappard (1936). “Letters to an artist: from Vincent van Gogh to Anton ridder van Rappard, 1881-1885”
Gerald Massey (1998). “The natural genesis, or, second part of A book of the beginnings: containing an attempt to recover and reconstitute the lost origines of the myths and mysteries, types and symbols, religion and language, with Egypt for the mouthpiece and Africa as the birthplace”, Black Classic Pr