From the mid 60's through the early 70's, seeing the Rams blue jerseys was just as rare as seeing the Cowb…

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Dallas Cowboys - Wikipedia

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Heritage Uniforms and Jerseys and Stadiums - NFL, MLB, NHL, NBA, NCAA, US Colleges: Los Angeles Rams Uniform and Team History

Pro Football Journal: Uniform Oddities: 1970-1975 Los Angeles Rams Uniforms

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As Washington finds new logo, here are the iconic NFL jerseys of then and now – Hartford Courant

Pro Football Journal: Uniform Oddities: 1970-1975 Los Angeles Rams Uniforms

Is wearing blue jerseys a jinx for the Dallas Cowboys? 'Enclothed cognition' suggests yes, it is

Heritage Uniforms and Jerseys and Stadiums - NFL, MLB, NHL, NBA, NCAA, US Colleges: Los Angeles Rams Uniform and Team History