Hi Gang Guess I need to clarify... She is looking for references & technical mumbo jumbo for exhibit hot air. She already has lots of green shells... Thanks Leslie ------------------ Hello A lady in the local shell club here is looking for information on "Green Shells" for an exhibit. I have refereed her to the comments in Compendium of Land Shells, but could use some other references. Any help is appreciated. please contact me at: [log in to unmask] or you can contact her directly: [log in to unmask]