beyond research group

#Sun #Quadrilaterals #Lines, bands #Letters presenting a special form of writing #Colours #Sun rising or setting #One quadrilateral #Quadrilaterals containing one or more letters #Quadrilaterals with dark surfaces or parts of surfaces #One line or one band #Curved lines or bands (except A 26.11.13) #Series of letters presenting different forms of writing #Series of letters in different dimensions #Letters in light-coloured characters on a dark background #Two predominant colours