Where can I find Three-grain bread in Romanshorn?

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

Abtwil SG Amriswil Arbon Au Bischofszell Constance Flawil Friedrichshafen Goldach Gossau Heiden Herisau Immenstaad am Bodensee Kreuzlingen Langenargen Markdorf Meckenbeuren Meersburg Oberteuringen Rheineck Rorschach St. Gallen Sulgen Tettnang Teufen Thal Tägerwilen Uhldingen-Mühlhofen Uzwil Widnau Wittenbach Zuzwil

You can also find this in Romanshorn:

Vegetable Juices Instant Iced Coffee Cheese Roll Canned Fish Fat Sauce Powder Spirits Stews Bakery Products Red Wine