Algebra for college students /gustafson r david roy david 1936著
Elementary geometry /gustafson r david roy david 1936著
College algebra and trigonometry /gustafson r david roy david 1936著
College algebra /gustafson r david roy david 1936著
Beginning and intermediate algebra : an integrated aproach [sic] /gustafson r david roy david 1936著
Essential mathematics with geometry /gustafson r david roy david 1936著