pg_dump more than one table in one command?

Good morning,

Under postgreSQL 8.0, could someone tell me how to pg_dump more than one 
tables at the same time please?

I tried to do something like:

pg_dump -h machineName -U username --inserts --column-inserts 
--file=dump.sql --table=t1 t2 ... ...tN -d databaseName ;

Thanks a lot!