HOUSTON, C. Stuart. Harold Herbert Pittman, 1889-1972 A Memorial Tribute. Blue Jay, [S. l.], v. 30, n. 4, 1972. DOI: 10.29173/bluejay3491. Disponível em: https://bluejayjournal.ca/index.php/bluejay/article/view/3491. Acesso em: 4 apr. 2025.