If I didn't know the history of how Bill put the book together, I would read that sentence as saying that Bill worked on film developers at Kodak in Rochester.
The use of the word "developers" is confusing. The book is about film developers, so it's only natural for the reader to think that the word "developer" in that sentence is referring to film developers. And, appearantly, not the people that actually designed the developers. That is, the developers of the developers. Is that less confusing?
But most importantly, isn't that quote from a "independant" reviewer of the FDC on Amazon? See the comment by John Douglas (Nashville, TN USA). Isn't he's the J&C Photo guy? He's an upstanding member of the photo community, right? I think we need to blame John for that ambiguous statement.
Anyway, we can't fault Bill for that quote.