Howdy, Carol...
I got my seeds from Tomato Growers Supply.
http://www.tomatogrowers.com/e...
They are also available from Tatiana's Tomato Database:
http://t.tatianastomatobase.co...
Last year when I got my seed from TGS they listed it as indeterminate. Just now looking I see they changed it to determinate. At other sites, like Tatiana's linked above, it is still listed as indeterminate.
Mine produced for quite a while but unfortunately were hit with one of the many foliage diseases we deal with here in NC so I can't say how long they would produce if kept completely healthy.
Shoe