Antonín Kumpera, ředitel továrny Walter (1928)
neznámý (unknown)
Magazine Auto, Vol. 10. (1928), No. 8. August, p. 521 - online: <a rel="nofollow" class="external free" href="https://kramerius.techlib.cz/kramerius-web-client/view/uuid:ae3d3e05-1dc1-47ee-9215-5d4919b7dbb7?page=uuid:68cf109a-3edb-11e7-b97e-001b63bd97ba">https://kramerius.techlib.cz/kramerius-web-client/view/uuid:ae3d3e05-1dc1-47ee-9215-5d4919b7dbb7?page=uuid:68cf109a-3edb-11e7-b97e-001b63bd97ba</a>