Zucchini Bread

1-1/2 cups flour                                             
2 cups brown sugar
1 cup whole wheat flour                               
2 cups shredded unpeeled zucchini
2 tsp cinnamon                                             
¾ cup oil
1 tsp salt                                                       
2 tsp lemon peel
1 tsp baking soda                                         
1 tsp vanilla
3 eggs