Biographie de Petra H. Kleinpenning
Previous publications by Petra H. Kleinpenning:
"The Correspondence of the Empress Alexandra of Russia with Ernst Ludwig and Eleonore, Grand Duke and Duchess of Hesse - 1878-1916". Norderstedt: BoD - Books on Demand GmbH. (2010)
"Grand Duke Ernst Ludwig and Princess Alix of Hesse and by Rhine in Italy - 1893". Amsterdam: Brave New Books. (2017)