Some pictures are samples from C64GFX12.LHA, a package of:
C64Gfx1.2 - a C64 grafix format conversion package
by Pasi 'Albert' Ojala

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Some pictures are from the historical funet.fi FTP site,
directory /pub/cbm/c64/graphics/pictures/FLI/
archived at http://www.commodore.ca/manuals/funet/cbm/index-t.html