Locating lesser Gothic architecture in northern France

Can anyone recommend a source locating Gothic structures in northern
France, primarily Picardie. I know where the great structures (Amiens,
Beauvais etc.) are located, but I suspect that there are delightful
lesser structures as well.

Ideally I'd like a map, but just a list that would help me create a map
would be helpful. I'm planning to be there for about a week this
summer and would like to plan my trip wisely.

Thanks

Jim Mitchell