ISBN 9780933635487 books & textbook
Petersen's Field Guide to Cthulhu Monsters: A Field Observer's Handbook of Preternatural Entities (Call of Cthulhu)
Sandy Petersen Lynn Willis Tom Sullivan
Chaosium /1988T Paperback / 64 Pages
isbn-10: 0933635486 / isbn-13: 9780933635487
