“Southern California” Smog Poster Added by Unknown 1685 on Jul 4th, 2020 Date 1971 Credits John Van Hamersveld 7 Ed Thrasher 5 Format Poster 1707 Type of Work Finished work 5482 Tags 1970s70'sCaliforniaLos AngelescollaborationPrintCriticismenvironmentenvironmentalTypographyPhotographytypeJVH