O. O. Roberts has written:
'A few hints on cholera'
David O. Roberts has written: 'Some notes of lessons for teachers of Priffordd y Gymraeg'
Louis O. Roberts has written: 'Man between earth and sky' -- subject(s): Philosophy, Architecture, Aesthetics
Stephen O. B. Roberts has written: 'A clinician's guide to fungal disease' -- subject(s): Mycoses
E. Meirion Roberts has written: 'Darlun o arlunydd' -- subject(s): Themes, motives
Glyn O Roberts has written: 'Mathematical model for a simplified Bridgman-Stockbarger crystal growing system' -- subject(s): Crystal growth, Mathematical models
Jason Lewis Roberts has written: '\\'
Desmond Roberts has written: 'Love was her alibi'
B.Dew Roberts has written: 'The Charlie Trees'
Octavia Roberts has written: 'The happy day ...'
J. Roberts has written: 'The Crooked Path'
David Roberts has written: 'Oriau'r awen'
Len Roberts has written: 'The disappearing trick'