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Interlingua (International Auxiliary Language Association) · Grammar
Interlingua
1987
Ancora dece-duo conversationes
1984
Interlingua (International Auxiliary Language Association) · Dictionaries
Concise English-Interlingua dictionary
Concise Interlingua-English dictionary
1980
Interlingua today
1994
Artificial Languages · Esperanto
International languages
1990
Introducing Interlingua
1993
Miscellanea · Interlingua (International Auxiliary Language Association)
Prejudicio, ignorantia, negligentia
1995
Higher Bebington and its school (1845-1913)
International Languages
1989