The photo has no copyright markings on it as can be seen in the links above.
United States Copyright Office page 2 "Visually Perceptible Copies The notice for visually perceptible copies should contain all three elements described below. They should appear together or in close proximity on the copies.
2 The year of first publication. If the work is a derivative work or a compilation incorporating previously published material, the year date of first publication of the derivative work or compilation is sufficient. Examples of derivative works are translations or dramatizations; an example of a compilation is an anthology. The year may be omitted when a pictorial, graphic, or sculptural work, with accompanying textual matter, if any, is reproduced in or on greeting cards, postcards, stationery, jewelry, dolls, toys, or useful articles.
To delo je v javni domeni, ker je bilo objavljeno v Združenih državah Amerike med letom 1978 in 1. marcem 1989 brez opombe o avtorskih pravicah, avtorske pravice na njem pa nato v 5 letih niso bile registrirane pri Uradu ZDA za avtorske pravice. Razen če je od smrti avtorja preteklo več let, je to delo v državah ali na območjih, ki za ameriška dela ne uporabljajo pravila krajšega trajanja, kot so Kanada (50 let p. s. a.), celinska Kitajska (50 let p. s. a., ne velja za Hongkong ali Makav), Nemčija (70 let p. s. a.), Mehika (100 let p. s. a.), Švica (70 let p. s. a.) in druge države z individualnimi pogodbami, avtorskopravno varovano. Za nadaljnjo razlago glejte to stran.