Home › Authors › David Sinclair David Sinclair b. 1901 ยท 2 books Books by David Sinclair Photoelasticity and its applic Photoelasticity and its application to minepillar and tunnel problems 1940 Lifetimes of potassium doublet Lifetimes of potassium doublets [lambda] 4047-4 and [lambda] 3447-6 1936