Gravina, Richard; Nelezek Barko, Robert; Tchalalao Abina, Robert | Mbuko lexicon | 2003 | | Linguistics |
Gravina, Richard; Gravina, Susan; Nelezek Barko, Robert | Wan ana ayah (L'écureuil) | 2001 | | |
Calalaw, Robert; Gravina, Richard; Nelezek Barko, Robert | Lǝbara zǝbor aya awan | 2000 | | |
Nelezek Barko, Robert | Ləbara ahay 1 | 2005 | | |
Calalaw, Robert; Gravina, Richard; Gravina, Susan; Nelezek Barko, Robert | Lǝbara cǝɗew aya awan | 1999 | | |
Gravina, Richard and Robert Nelezek | Avinde ʼam sǝ mbuko | 1999 | | Literacy and Education |
Gravina, Richard; Nelezek Barko, Robert | Ləbara sə Mahamet Wundala | 1999 | | |
Gravina, Richard; Gravina, Susan; Nelezek Barko, Robert | 'Am sə guvugo ahay mə slala cew awan (Deuxième livret de contes) | 2001 | | |
Gravina, Richard; Nelezek Barko, Robert | ʼAm sǝ guvugo ahay mamaʼam awan | 1999 | | |
Gravina, Richard; Nelezek Barko, Robert; Tchalalao Abina, Robert | Mbuko - French - English lexicon | 2003 | | Linguistics |