Blue replaced brown on Padres uniforms in 1991, by FriarWire
1970s NL Uniforms
Uni Watch's Friday Flashback -- What brown has done for Padres - ESPN
MLB Historical Alternates Series (Powder Bluepalooza - Cubs & White Sox 9/11) - Page 4 - Concepts - Chris Creamer's Sports Logos Community - CCSLC - SportsLogos.Net Forums
San Diego Padres Jersey History presented by The Glaze Page
Throwback uniform - Wikipedia
Uni Watch's Friday Flashback -- What brown has done for Padres - ESPN
Padres uniforms: Visual history of brown, yellow, blue, orange, sand - The San Diego Union-Tribune
1972 San Diego Padres - Uniforms and Accessories - MVP Mods
Padres uniforms: Visual history of brown, yellow, blue, orange, sand - The San Diego Union-Tribune
1969 Billy McCool Game Worn Inaugural Season San Diego Padres, Lot #81087
Padres uniforms: Visual history of brown, yellow, blue, orange, sand - The San Diego Union-Tribune