This collection of advertising I've grouped together into "Dealer" marketing -- things you might find at the dealership, or information booklets targeted toward the dealers and salesmen themselves versus the general public. Some of these are very useful (Dealer Match Book for example) and others are quite campy and entertaining ("Put a Plus in your Pitch"). The first three here are rather rare (Match Book, Facts Book and Press Kit). I've only seen them come up for auction once or twice.

1956 Buick - New Site Access
1956 Buick Marketing - Dealers