Riverside Quarterly was one of the first zines I saw, back in the 70s. It was, as we said, sercon: serious, constructive, academic. For me, Sturgeon's approximation applied: solemn studies of ancient, historically important pre-sf, with maybe one really nifty article on someone like PKD and some good stuff in the lettercol. It helped lure me into the subculture. The zine faded away long ago, and now Leland has.