Folk Fundamentals, 2020 EditionEdward P. Welch, Robert S. Saunders, Allison L. Land, Jennifer C. Voss, Andrew J. Turezyn · First published 2019Open the Tome
Industrial gas distributorsMary F. Welch, Jennifer L. Mapes, Tonia Ferrell, Dawn J. Trebec · First published 2000Open the Tome
Paints & coatingsMary F. Welch, Jennifer L. Mapes, Diana E. Kole, Dawn J. Trebec · First published 2000Open the Tome
Telecommunications equipmentMary F. Welch, Jennifer L. Mapes, Joseph F. Healey, Margaret K. Strekal · First published 2000Open the Tome
