Issue found!
{{ $model := .model }}

{{ $page := 0 }}
{{ range  $piece := .model.Pieces.IssuePieces }}
	<div>
		{{ if (ne $page $piece.Von) }}
			{{ $page = $piece.Von }}
			<div>S. {{ $page }}</div>
		{{ end }}

		Piece!
		{{ if gt (len $piece.IssueRefs) 1 }}
			{{ len $piece.IssueRefs }} Teile
			<ol>
				{{ range $issue := $piece.IssueRefs }}
					<li>
						<a href="/{{- $issue.Datum -}}/{{- $issue.Nr -}}">
							{{- $issue.Datum }} Nr.
							{{ $issue.Nr -}}
						</a>
					</li>
				{{ end }}
			</ol>
		{{ end }}

		{{ range $agentref := $piece.AgentRefs }}
			{{ $agent := GetAgent $agentref.Ref }}
			{{ if gt (len $agent.Names) 0 }}
				{{ index $agent.Names 0 }}
			{{ end }}
			{{ if (or (eq $agentref.Category "") (eq $agentref.Category "autor")) }}
				<span>Author</span>
			{{ end }}
		{{ end }}

	</div>
{{ end }}