Combine 3 cups of flour, yeast, sugar, salt and baking soda in a large bowl.

Heat milk and water until very warm (not boiling).

Add the warm liquid mixture to the dry ingredients and beat well until combined.

Add the remaining 3 cups of flour to form a dough.

Knead the dough until it is smooth and elastic.

Let the dough rise in a warm place until doubled in size.

Divide the dough into loaves.

Place each loaf in a greased loaf pan that is sprinkled with cornmeal.

Let the loaves rise again until almost doubled.

Bake in a preheated oven until golden brown.