Errata on this week's blog

My apologies that the Quizlet link in yeterday's blog had a superfluous full stop at the end, which meant that clicking on it did not work. Thanks to all of you that have let me know of this error. So many that I am taking this unusual step of providing an errata, for the benefit of those that receive my blogs through email, rather than visiting my blog site at www.barryrhodes.com. Below is the correct link in the original context.