reading Gibbs, Carl. Collector's Encyclopedia of Metlox Potteries: Identification and Values, Second Edition. Collector Books (2001) Chipman, Jack. Collectors Encyclopedia of California Pottery, Second Edition. Collector Books (1998) External links Metlox-Poppytrail-Vernonware History Kitchenware brands Companies based in California Ceramics manufacturers of the United States Manhattan Beach, California Defunct companies based in Greater Los Angeles