Grocery buying is serious business today. It's not only a question of how much each sack of groceries cost, but of how much food value goes home for the money spent. High food costs force most families to purchase only what's needed and no more.
Nelson, B. M.
"Homemade or Ready-Mix - Which?,"
Iowa Farm Science: Vol. 2
, Article 6.
Available at: https://lib.dr.iastate.edu/farmscience/vol2/iss8/6