伊丽莎白·A·内德维尔的《显示初级、次级和三级颜色的光盘》-Elizabeth A. Nedwill
Disc Showing Primary, Secondary and Tertiary Colors–Elizabeth A. Nedwill (美国, 19th century)
伊丽莎白·A·内德维尔的《显示初级、次级和三级颜色的光盘》-Elizabeth A. Nedwill
Disc Showing Primary, Secondary and Tertiary Colors–Elizabeth A. Nedwill (美国, 19th century)