Analysis of information sources in references of the Wikipedia article "Grape-Nuts" in English language version.
Since C.W. Post distributed the first grocery coupon for a penny off his new Grape Nuts cereal in 1895, coupons have grown into a staple in U.S. households
most famous quote from the father of modern foraging, the late, great Euell Gibbons, who spoke those words in a Grape Nuts commercial back in the 1970s