ATTRIBUTION

reference/image/lake-*.jpg:
    Pudelek
    [CC BY-SA 4.0  (https://creativecommons.org/licenses/by-sa/4.0)],
    from Wikimedia Commons
    <https://commons.wikimedia.org/wiki/File:Lake_Shkopeti,_Albania.jpg>

reference/image/raspberries-*.jpg:
    fir0002 | flagstaffotos.com.au
    [GFDL 1.2 (http://www.gnu.org/licenses/old-licenses/fdl-1.2.html)],
    from Wikimedia Commons
    <https://commons.wikimedia.org/wiki/File:Raspberries05.jpg>

reference/image/rebar-*.jpg
    By W.carter
    [CC BY-SA 4.0  (https://creativecommons.org/licenses/by-sa/4.0)],
    from Wikimedia Commons
    <https://commons.wikimedia.org/wiki/File:Rusty_rebar_nets.jpg>

reference/image/seeds-*.jpg:
    Sanjay Acharya
    [CC BY-SA 4.0  (https://creativecommons.org/licenses/by-sa/4.0)],
    from Wikimedia Commons
    <https://commons.wikimedia.org/wiki/File:Coriander_Seeds.jpg>

reference/image/soyuz-*,jpg
    Expedition 20 Crew, NASA
    [Public domain],
    via Wikimedia Commons
    <https://commons.wikimedia.org/wiki/File:Soyuz_TMA-16_approaching_ISS.jpg>

reference/image/wave-*.png
    Katsushika Hokusai
    [Public domain],
    via Wikimedia Commons
    <https://commons.wikimedia.org/wiki/File:Tsunami_by_hokusai_19th_century.jpg>