Well, I've found Volume 8, Number 2, February 1937 and been through it.
Nothing on the WA Centenary stamp in that issue.
I've also been through the January 1937 edition as well as May and July editions of that year - on the off chance that it may have been in an earlier or later edition. Nope. Nothing.
Perhaps #85 is Volume 8 Number 5, which would mean it's the May edition. However, given I've been through that edition as well, there must be something I'm not comprehending regarding what is meant by #85 that Rod referred to below (7/12)Australian Stamp Journal #31
The Australian and Victorian Philatelic record #51
Australian Stamp Monthly #85
Cumulative Index of source material
I've looked in the January, March, April and December editions of 1936.
I've also done all of the 1934 and 1935 editions.
Unfortunately, as you can see there are a few holes in the holdings for 1936 and 1937. And, regrettably, the collection doesn't go back beyound 1934 - which is probably where any discussion would be found.