Source: https://www.researchgate.net/publication/337813544_Symbiosis_of_Modernisation_and_National_Identity_in_the_Legacy_of_the_Baltars_Baltic_Art_Porcelain_Painting_Workshop_1924-1930/fulltext/5deba21d299bf10bc34786b4/Symbiosis-of-Modernisation-and-National-Identity-in-the-Legacy-of-the-Baltars-Baltic-Art-Porcelain-Painting-Workshop-1924-1930.pdf