With articles by Aziz, Besada, Titel, Hier, Hutchinson, Poon, Lee, Reed, Spreadborough, Stephenson, Stroud, and Wallmark; essay by Attas; review by Keep.
With articles by Sewell, Duinker, Stroud, Brody, Reuven, Horton; articles from the SMT 2019 Plenary session by Marvin, Ewell, Everett, Straus, and Hisama; and reviews by Farbood and Fulkerson.