Heat water, yogurt and butter to boiling. Stir in oats, wheat germ and bran.
Set aside until cooled to very warm (120 - 130 F) about 30 minutes.
In a large bowl, combine 1 - 1/3 cups all purpose flour, whole wheat flour, and barley flour, sugar, yeast, and salt.
Stir in cooled bran mixture.
Beat 2 minutes at medium speed of electric mixer, scraping the bowl occasionally.
Add 1 egg and 1 cup all purpose flour, beat 2 minutes at high speed.
Stir in enough remaining flour to make a soft dough.
Knead on lightly greased surface until smooth and elastic, about 8 to 10 minutes.
Cover, let rest 10 minutes.
Divide the dough in half and form into loaves
Place seam side down in 2 graded 8 1/2 x 4 1/2 inch loaf pans.
Cover, let warm, draft free place until doubled in size, about 1 hour.
Bake at 350 degrees F for 30-35 minutes or until the brown is golden brown all over.