Phil Walthers

• Walthers 2018 HO-N-Z Model Railroad Reference Book
• Walthers HO Model Railroad Reference Manual 2002
• 2005 HO Reference Book
• The World of Large Scale Trains - 1989
• Walthers 1998 Ho Catalog
• Walthers 2006 N&Z Railroad Reference Book
• Walthers Ho 2006 (Model Railroad Reference Book)
• Walthers The World of Large Scale Trains 1991