Gestación por substitución. En perspectiva comparada.Joao Proenca Xavier · First published 2019Open the Tome
Traditional Astrology CourseLuis Ribeiro, Maria Joao Mateus, Joao Xavier · First published 2019Open the Tome
Curso de Astrologia TradicionalHelena Avelar, Luis Ribeiro, Joao Xavier, Luís Vicente · First published 2018Open the Tome
Tratado das EsferasHelena Avelar, Luis Ribeiro, Susan Ward, Joao Xavier, Joao Concha · First published 2017Open the Tome
