Trimmer, J. (1842). Practical geology and mineralogy: With instructions for the qualitative analysis of minerals. Lea and Blanchard.
Dyfyniad Arddull ChicagoTrimmer, Joshua. Practical Geology and Mineralogy: With Instructions for the Qualitative Analysis of Minerals. Philadelphia: Lea and Blanchard, 1842.
Dyfyniad MLATrimmer, Joshua. Practical Geology and Mineralogy: With Instructions for the Qualitative Analysis of Minerals. Lea and Blanchard, 1842.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.