To follow up on the mag article there is a special index for garden periodicals--but its abit out of date. Its called "Garden Literature" but the last issue came out in 2000. It will soon be a database marketed by EBSCO, but its not quite out yet. The PA Hort soc has "Garden Lit" as may a library in NJ(Rutgers?) You can also try a search on Agricola at http://agricola.cos.com/adhocframe.shtml

But ..., is there any chance that this is what you want?
http://www.dec.state.ny.us/website/education/stonykil.html
Or
The University of Connecticut Cooperative Extension office at 67 Stony Hill Road in Bethel, Conn?

Good luck
Springcherry