Ethnic competition in the retail trade in northern U.S. cities in 1900 : a test of the saturation theory of entrepreneurshipBOYD, R.L.Urban geography. 2003, Vol 24, Num 1, pp 45-60, issn 0272-3638, 16 p.Article

The ‘Black metropolis’ revisited : a comparative analysis of northern and southern cities in the United States in the early 20th centuryBOYD, R.L.Urban studies (Harlow). 2012, Vol 49, Num 4, pp 845-860, issn 0042-0980, 16 p.Article

Retail and wholesale enterprise among ethnic groups in core and peripheral urban centers : the late-nineteenth-century United StatesBOYD, R.L.Urban geography. 2014, Vol 35, Num 3, pp 454-470, issn 0272-3638, 17 p.Article

Beyond urban economies : retail enterprise among immigrant groups in the hinterlands of the United States in the late nineteenth centuryBOYD, R.L.Regional studies. 2013, Vol 47, Num 9, pp 1523-1533, issn 0034-3404, 11 p.Article

Urban locations of eminent Black entrepreneurs in the United StatesBOYD, R.L.Urban studies (Harlow). 2009, Vol 46, Num 10, pp 2061-2078, issn 0042-0980, 18 p.Article