The article, "It Separated the Wheat from the Chaff": The "1975" Prophecy and its Impact among Dutch Jehovah's Witnesses
is available on PDF. I cut and pasted your reference to it and found it at http://socrel.oxfordjournals.org/cgi/content/abstract/50/1/23
(Go to the right side and click FREE FULL TEXT PDF.)
I will take a look at it. Thanks.