<https://www.astrolearn.com/astrology-bibliography/astrologie-in-onderzoek/#webpage>
<http://schema.org/description>
"Library catalogue entry for the Dutch astrological research journal \"Astrologie in Onderzoek\" ed. Wout Heukelom, Diemen / Amsterdam, 1986-2003 (astrology)"
<https://www.astrolearn.com/astrology-bibliography/astrologie-in-onderzoek/>