The May issue of WorldHockey Online magazine is now available to read exclusively on worldhockey.org. Once again, this month's issue contains a wide selection of features from throughout the hockey world.

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This month we look at the methods employed by international umpires and umpires managers to improve their performances at major tournaments.

There are profiles on Chinese men's coach Kim Sang Ryul, and New Zealand captain Ryan Archibald, and we have a photo gallery from the official opening of the stadium that will host the men's BDO Hockey World Cup in September.

Also, there is a review of the two World Cup qualifying tournaments that were held in April and early May and we delve into hockey in Iran.

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