3 literature references for Sclerocactus whipplei var. glaucus (K. Schum.) S.L. Welsh:

Author:
Year: 1996
Title:
Source: database, NODC Taxonomic Code
Author:
Year: 2000
Title:
Source: database, The PLANTS Database
Author:
Year: 1996
Title:
Source: database, The PLANTS Database