This page just cries out for a date. When was it written? I can't tell. The latest reference is 2012, but that leaves a 2-year period. I tried the PDF. No date

This page just cries out for a date. When was it written? I can't tell. The latest reference is 2012, but that leaves a 2-year period. I tried the PDF. No date there, either. Try the citations. Finally: 2013. But that's 'way too much work to answer an obvious question. So, everyone -- including Mr. Halftaker -- when you publish anything, put a date on it!