Are the bowlder clays of the great plains marine?
By: [George M. Dawson].
Contributors: Geological Survey of Canada.
Series: CIHM/ICMH Microfiche series = CIHM/ICMH collection de microfiches -- no. 30723; CIHM/ICMH microfiche series -- no. 30723
Publisher: s.n.
Published: 1897
Place of publication: [S.l
Format: Microform
Subjects: Clay soils.; Sols argileux.