The PDF archive is currently not functional. See instead our unified Table of Contents for issues published between 1941 to 2013. If you're looking for a particular issue, consider purchasing individual back issues or you might be interested in the full Seven-Decade DVD Collection, which includes every article and advertisement from those years. We also issue DVD updates on a yearly basis.
We hope to resume selling articles piecemeal at some time, but there is no concrete deadline for doing so.