00747cam a22002291 4500 gs 21000252 DLC 20260227111325.0 760412s1920 xx 000 0 eng gs 21000252 (OCoLC)2107227 DLC TxEU DLC premarc QE91 .A4 no. 21 Worcester, Philip G. (Philip George), 1884- The geology of the Ward region, Boulder County, Colorado, by P. G. Worcester. Denver, Eames bros., state printers [1920] 74 p. 2 fold. maps (in pocket) 23 cm. Colorado Geological Survey. Bulletin, 21 Bibliography: p. 72. Geology Colorado Boulder County. 26101 26101