Where can I find Three-grain bread in Gross SZ?

Three-grain bread can also be found in these cities:

Baar Einsiedeln Goldau Horgen Ibach SZ Ingenbohl Lachen Männedorf Richterswil Rüti Stäfa Thalwil Unterägeri Uznach Wald Wädenswil Zug

You can also find this in Gross SZ:

Baguette Yeast Dry Rye Breads Granola Bar Pies Cola Legumes Ketchup Chips Remoulade