July-September 2010 lack vol. and issue designations; October 2010 called Vol. 16 issue IV in continuation of the earlier title; November 2010 lacks vol. and issue designations but consitutes v. 16, issue V.
Issue for May/June 2012 called Vol. 18, issue VI but constitutes Vol. 18, issue V/VI; issue for August/September 2012 called Vol. 18, issue IX but constitutes Vol. 18, issue VIII/IX.