![](/files/03/73/87/f037387/public/a174427bdf448e53ce20e149b0ddeee1.gif) | oil-field engineers, 141
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![](/files/03/73/87/f037387/public/a174427bdf448e53ce20e149b0ddeee1.gif) | opera singers, male, 71
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![](/files/03/73/87/f037387/public/a174427bdf448e53ce20e149b0ddeee1.gif) | professional athletes, 136, 141
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![](/files/03/73/87/f037387/public/a174427bdf448e53ce20e149b0ddeee1.gif) | rodeo riders, 136137
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![](/files/03/73/87/f037387/public/a174427bdf448e53ce20e149b0ddeee1.gif) | rural versus urban workers, 149
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![](/files/03/73/87/f037387/public/a174427bdf448e53ce20e149b0ddeee1.gif) | scientists, 134135
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![](/files/03/73/87/f037387/public/a174427bdf448e53ce20e149b0ddeee1.gif) | steel company, woman employee, 57
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![](/files/03/73/87/f037387/public/a174427bdf448e53ce20e149b0ddeee1.gif) | travel and high-testosterone men, 124
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![](/files/03/73/87/f037387/public/a174427bdf448e53ce20e149b0ddeee1.gif) | traits of high- or low-testosterone and choice of, 140146, 149150
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![](/files/03/73/87/f037387/public/a174427bdf448e53ce20e149b0ddeee1.gif) | white-collar jobs, 47, 147, 148
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![](/files/03/73/87/f037387/public/a174427bdf448e53ce20e149b0ddeee1.gif) | women in traditional male jobs, 138139
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![](/files/03/73/87/f037387/public/a174427bdf448e53ce20e149b0ddeee1.gif) | Oedipus, 151
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![](/files/03/73/87/f037387/public/a174427bdf448e53ce20e149b0ddeee1.gif) | Old Soldiers Home, Washington, D.C., 49
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