There's a cookbook called SQUARE MEALS by Jane and Michael Stern that is
a compilation of different eras of American life. It has a '70's section. Some of the other sections are: diner food, army food, ladies lunches and nursery food.
It was published in 1984 and I couldnt find an ISBN number, but it was published by alfred A. Knopf.
Here are a couple of recipes from it:
Ann Lander's Meat Loaf
1 # ground beef 1 1/2 cups cracker crumbs
1/2 # ground veal 3/4 cup ketchup
1/2 # ground pork 1/2 cup warm water
1 tsp. Worchestershire sauce 1 package dry onion soup mix
2 eggs 4 strips bacon
1 8oz. can tomato sauce
Preheat oven to 350F.
Mix meats together in a large bowl. Add W. sauce, eggs, crumbs, ketchup, water, and soup mix. Shape into a loaf in a shallow baking dish, drape with bacon strips, then pour tomato sauce over loaf. Bake 1 1/2 -- 2 hours or until done to your liking. Serves 6 - 8.

Dogs on a Stick
10 hot dogs 1 cup milk
10 6" wooden sticks oil for frying
3 cups Biscuick Mustard
3 eggs
Stick each hot dog firmly on a stick and pat with a cloth to make sure it's dry.
Mix Bisquick, eggs and milk to form a thick batter. Dip each hot dog into batter, thouroughly coat it. Heat oil to 375F. Slowly immerse weiners, 2 0r 3 at a time,
into the hot oil. Cook 3 to 4 minutes or until golden brown. Drain on paper towels. Serve with a bowl of mustard for dunking. Serves 4-6 teens.