John R. Williams

APEX USERS GUIDE v. 2110

Jay D. Atwood, Wyatte L. Harman, Erda Wang, 2006 .

DECLARATION OF HELSINKI

John R. Williams, 1964 .

The electrocardiogram in subarachnoid haemorrhage

John R. Williams, R. Marshall, 1965, Irish journal of medical science.

Ostracoda from the Weches Formation at Smithville, Texas

John R. Williams, A. H. Sutton, 1939 .