That's true, Anik -- seems that there was some nice glass produced apart from the stemware.
Only thing I can add is what Leslie Jackson writes in her book "20th century factory glass":
...Also during the 1960s, Taraba designed coloured vases and bowls with simple forms, sometimes free-blown with restrained, organic shapes, sometimes mould-blown with regular, thin-walled forms....
So maybe Taraba is more likely than Holosko as a designer for this range?
BTW, check out my picasa gallery, I added a very nice Vizner vase (PN 13181) to my Sklo Union collection :rah: