{% if picture.image_file %}
<img src="{% thumbnail picture.image_file "139x193" crop="center" as thumb %}{{ thumb.url }}{% empty %}{{ picture.image_file.url }}{% endthumbnail %}" alt="{{ author }} – {{ picture.title }}" class="cover" />
{% endif %}
{% if picture.image_file %}
<img src="{% thumbnail picture.image_file "139x193" crop="center" as thumb %}{{ thumb.url }}{% empty %}{{ picture.image_file.url }}{% endthumbnail %}" alt="{{ author }} – {{ picture.title }}" class="cover" />
{% endif %}