His The chemistry of beer, 2013: ECIP title page (Roger Barth, Ph.D.)
Mastering brewing science, 2019: Ecip t.p. (Roger Barth) data view (Roger Nicholas Barth, Birth Date: 02/07/1984)
The chemistry of beer, 2022: ECIP title page (Roger Barth) data view (After working on development of car catalysts at UOP Inc. in Des Plaines, Illinois, he did postdoctoral work on surface and catalytic chemistry at University of Delaware and at Drexel University. He taught chemistry at West Chester University of Pennsylvania from 1985 until his retirement in 2021)