You can many historic agricultural resources on the WSU campus in Pullman. If you should have any questions about these collections please contact me.
The Owen Science & Engineering Library
The Owen Science & Engineering Library houses many historic maps and publications. The map library is located on the third floor.
You can find maps by using the WSU Search It library catalog and limiting your results to display just maps. Here is an image that demonstrates how to do that.
The Owen Library also houses many historic science and engineering documents including many of the Washington State College Extension publications.
The Marion Ownbey Herbarium provides a collection of over 400,000 specimens of vascular and nonvascular plants and lichens. It is located on the 4th floor of the Owen Library. It is generally open daily and free to the public.
Holland and Terrell Libraries
The Holland and Terrell Libraries also contains many historic documents, extension publications, and regional newspapers.
Manuscripts, Archives & Special Collections (MASC) is located on the bottom floor of the Holland and Terrell and houses many historic agricultural documents ranging from early publications, ephemera, historical images, researcher notes and correspondences, local histories, and much more.