The links below are for scans of bound volumes of two or three months each of Newsweek magazine back issues at the Internet Archive, from 1936 to 2008. Unfortunately many volumes are missing.
Newsweek Magazine : Scanned Back Issues
1936 – Jan-Mar – Apr-Jun – Oct-Dec
1937 – Jan-Mar – Apr-Jun – Jul-Sep – Oct-Dec
See all our free news & political magazines
1938 – Apr-Jun – Jul-Sep – Oct-Dec
1939 – Jan-Mar – Apr-Jun – Jul-Sep
1940 – Jan-Mar – Apr-Jun – Oct-Dec
1941 – Jan-Mar – Apr-Jun – Jul-Sep
1942 – Jan-Mar – Apr-Jun – Jul-Sep – Oct-Dec
1943 – Jan-Mar – Jul-Sep – Oct-Dec
1944 – Jan-Mar – Apr-Jun – Oct-Dec
See our free business & economic magazines