I am researching the history of Seattle's Fisher family. The Fisher's owned a huge flour mill. I am trying to understand the political context of Fisher's role in the grain trade.

I have a book, "Merchants of Grain" by Dan Morgan, which outlines the global and political implications of the grain trade. It was written in 1979. I am looking for some material that would bring my understanding of this issue up to the current day. I am sure the type of article i am looking for would at least reference this book.

Ideally, I am looking for articles that would talk about or atleast reference Fisher Flour Mills, but this is not a necessity. I would prefer to get my source material from a more politically radical journal, if possible. ideas on what journals to look for would be a helpful starting point.