Gonçalves, Ana Carla; Ouhammoud, Ahmed; Amirouche, Rachid; Santos, Conceição; Figueiredo, Estrela; Silveira, Paulo
A taxonomic revision of Calendula (Asteraceae) in Morocco, including some taxa from Algeria and Tunisia
Teddington School Expedition & Fes Azrou & Khenifra & Allinson