Fonte positiva dos dados

Autor de: Halo Cryptum. 2012: (ficha cat.: d.n.)

http://authorities.loc.gov 21/3/2014: (d.n.)

http://viaf.org/processed/DNB%7C122684524: (d.n.)

http://catalogue.bnf.fr: (escritor americano; d.n.)

http://viaf.org/processed/BNE%7CXX928954: (d.n.)