Group Portrait of Flora of North America Editorial Committee; Fire Board Meeting; "The Hand of Man on America" Exhibition, 1970, Smithsonian Institution Archives, Group portrait of Flora of North America Editorial Committee, November 6, 1970; Fire Board meeting at the National Museum of History and Technology, now known as the National Museum of American History; "The Hand of Man on America: Photographs by David Plowden" exhibition, November 9, 1970..