por Schultz, Jeffrey D [editor] | Thomas, Helen [prologuista].
por Schultz, Jeffrey D [editor] | West, John G [editor] | MacLean, Iain S, 1956- [editor] | Thomas, Helen [prologuista].
por Schultz, Jeffrey D [editor] | Van Assendelft, Laura A [editor] | Thomas, Helen [prologuista].