What has the author John Walk written?

John Walk has written:

'Fenton Glass Compendium, 1940-1970'

'Fenton Special Orders, 1940-1980'

'The big book of Fenton glass, 1940-1970' -- subject(s): Catalogs, Collectors and collecting, Fenton Art Glass Company, Glassware, History

'Fenton Rarities, 1940-1985'

'The Big Book of Fenton Milk Glass, 1940-1985'