In 1924 an Assyrian Mission Press was started by the efforts of
Joseph Kellaita, Deacon of the Assyrian Church of the East (later made priest
Qasha Yosip in 1927). He was responsible for starting the Mar Narsai Press in
Trichur, India.
Qasha Joseph D'Qellaita was a Assyrian scholar. He belonged to the Kellaita
family (distant cousin) of Mar Abimalek Timotheus Metropolitan of the
Assyrian Church of the East in Malabar and India.  Mar Timotheus who visited
Iraq in 1919 and in 1920 to help the settlement of the Assyrian refugees who
were in the Baquba camp near Bagdad brought Deacon Joseph Kellaita to Trichur. He spent nearly two years in Trichur writing the Assyrian types for the smiths and carpenters to make the 'mould' for casting the metal types for printing.
 Around 1923 or so Deacon Joseph Kellaita took all the types (fonts) he had prepared in Trichur to Mosul in Iraq to start a printing press "Nineveh Press" in Iraq.  Mar Timotheus Metropolitan was not disappointed.  He worked for another set of the similar Assyrian types and started in 1926, Mar Narsai Press in India Trichur.
Mar Narsai Press, printed many Assyrian books.  During 1929-1933 a brilliant Assyrian student of Rev. Joseph Kellaita namely Deacon Benjamin Geevarghese of Ashitha came from Mosul and assisted the Assyrian printing as well as teaching students Assyrian language.
Many precious prayer books i.e. Khudra, Qurbana Thaksa, Burial books, Marriage books, D’Qdam Vadvathar, Blessing of the House (Boorakh Bathe), Thurgama, etc. were printed by the Assyrian Press, Nineveh Press & Mar Narsai Press. Info from www.nestorian.org