BARRE, Mass. >> One by one, items purportedly taken from Native Americans massacred at Wounded Knee Creek emerged from the dark, cluttered display cases where they’ve sat for more than a century in a museum in Massachusetts.

Moccasins, necklaces, clothing, ceremonial pipes, tools and other objects were carefully laid out on white backgrounds as a photographer dutifully snapped pictures under bright studio lights. It was a key step in returning scores of items displayed at the Founders Museum in Barre to tribes in South Dakota that have sought them since the 1990s.

“This is real personal,” said Leola One Feather, of the Oglala Sioux Tribe, as she observed the process as part of a two-person tribal delegation last week. “It may be sad for them to lose these items, but it’s even sadder for us because we’ve been looking for them for so long.”

Recent efforts to repatriate human remains and other culturally significant items such as those at the Founders Museum represent significant and solemn moments for tribes. But they also underscore the slow pace and the monumental task at hand.

Some 870,000 Native American artifacts — including nearly 110,000 human remains — that should be returned to tribes under federal law are still in the possession of colleges, museums and other institutions across the country, according to an Associated Press review of data maintained by the National Park Service.

UC Berkeley tops the list, followed closely by the Ohio History Connection, the state’s historical society. State museums and universities in Pennsylvania, Tennessee, Alabama, Illinois and Kansas as well as Harvard University round out the other top institutions.

And that’s not even counting items held by private institutions such as the Founders Museum, which maintains it does not receive federal funds and therefore doesn’t fall under the Native American Graves Protection and Repatriation Act, or NAGPRA, the 1990 law governing the return of tribal objects by institutions receiving federal money.

“They’ve had more than three decades,” says Shannon O’Loughlin, chief executive of the Association on American Indian Affairs, a national group that assists tribes with repatriations. “The time for talk is over. Enough reports and studying. It’s time to repatriate.”

Museum officials say they’ve stepped up efforts with added funding and staff, but continue to struggle with identifying artifacts collected during archaeology’s early years. They also say federal regulations governing repatriations remain time-consuming and cumbersome.