At this point there were more than 3,600 clusters where the friends were striving to establish new programmes of growth or to advance existing ones. An analysis of developments in some 200 of the most advanced of these clusters—particularly the strongest 20—suggested effective strategies for growth and demonstrated the efficacy of pursuing lines of action in a coherent manner. This publication offered a close examination of the pattern of action characteristic of the clusters at the forefront of learning.

Try also a shorter date like 2013-04-0 or 2013-04

try also the Chronology Canada — 2013-04-00 or 2013-04-0 or 2013-04