Müllers Großes Deutsches Ortsbuch. Bundesrepublik Deutschland. Vollständiges GemeindelexikonHelmut Opitz · First published 2002Open the Tome
World guide to scientific associations and learned societiesHelmut Opitz · First published 2001 · Latest edition 2002Open the Tome
Enciclopedia Pediatrica Vol. 1 / Pt. 2 Fisio Patologia del RecienHelmut Opitz · First published 1974Open the Tome
Enciclopedia Pediatrica Vol. 8 / Pt. 2 Tumores en la InfanciaHelmut Opitz · First published 1974Open the Tome
Enciclopedia Pediatrica Vol. 9 Ojos / Nariz / Dientes / PielHelmut Opitz · First published 1972Open the Tome
Enciclopedia Pediatrica Vol. 2 / Pt. 2 Terapeutica PediatricaHelmut Opitz · First published 1971Open the Tome
Enciclopedia Pediatrica Vol. 8 / Pt. 1 Neurologia / PsicologiaHelmut Opitz · First published 1971Open the Tome
Enciclopedia Pediatrica Vol. 6 Enfermedades de los Tejidos DeHelmut Opitz · First published 1970Open the Tome
Enciclopedia Pediatrica Vol. 3 Immunologia. Pediatria SocialHelmut Opitz · First published 1969Open the Tome
Enciclopedia Pediatrica Vol. 7 Enfermedades del Aparato RespiratoHelmut Opitz · First published 1968Open the Tome
Enciclopedia Pediatrica Vol. 4 Metabolismo / Nutricion / DigestionHelmut Opitz · First published 1967Open the Tome
