David Barsalou has dedicated decades to identifying all of Lichtenstein's source materials and has posted more than 1,000 images on Flickr detailing Lichtenstein's unrecognized sources.
大卫·巴萨卢（David Barsalou）花费数十年时间来研究利希滕斯坦所有作品的资料来源，而且他已经在Flickr上发布了1000多幅图片来详细介绍这些让人无法辨别的资料来源。