In 2005, the Letonikas grāmatu autoru rādītājs (1523-1919) (Index of the Authors of Lettonica Books (1523–1919)) was published, providing information about versatile branches of science and representatives of various nations, Latvia being the main focus of their publications.
2005. aastal avaldati "Letonica autorite register (1523–1919)" ("The Index of the Authors of Letonica Books (1523–1919)"), mis koondab teavet paljude teadusharude esindajate ja eri rahvusest autorite kohta, kuigi põhiliselt keskendutakse seal Lätit puudutavatele artiklitele.