Harry Pierson, Jr. is a registered profession engineer, retired, who has worked for major consulting and engineering firms, in the steam power generation, petroleum, and pulp-and-paper industries f...vizualizați mai multeHarry Pierson, Jr. is a registered profession engineer, retired, who has worked for major consulting and engineering firms, in the steam power generation, petroleum, and pulp-and-paper industries for over thirty years, in the United States and Canada.vizualizați mai puține