This must be a case where Blaug dropped the ball. The guy is capable of errors. I don't what Lipsey called it in his article as I don't have that handy, but lots of people cite the Samuelson-Solow article as the source of the term, and it sure looks like it to me. Certainly Samuelson's putting it in his textbook popularized it and made it a, well, textbook concept. His main argument was the lag between costs and prices.
Costs lag behind prices.
These, in my opinion, are key issues that are clearly set out by Fisher and that were later brought up and analyzed by Neoclassical economists during the Ph. As for the fact that many economists before the 20th century analized the relationship between monetary and real variables. It s a key topic in the history of economic thought. LIpsey may well have beaten Samuelson and Solow to the punch. This shows the Menu of Choice between Different Degrees of Unemployment and Price Stability, as Roughly Estimated from the Last Twenty-Five Years of American Data.