Items1.query().$promise
.then(function (data) {
  $scope.items1 = data.list;
  return Items2.query().$promise;
})
.then(function (data) {
  $scope.items2 = data.list;
});

{
    list: [...],
    next: true,
    limit: 20,
    last: 20
}

App.factory('Items1', ['$resource',
    function($resource) {
        return $resource('items1/:item1Id', { storeId: '@id'
        }, {
            query: {
                method: 'GET',
                isArray: false
            },
            update: {
                method: 'PUT'
            }
        });
    }
]);