Weaver, T. (1841). On the composition of chalk rocks and chalk marl by invisible organic bodies, from the observations of Dr. Ehrenberg, with an appendix, touching the researches of M. Alcide d'Orbigny. print. by Richard and John E. Taylor.

Weaver, Thomas. On the Composition of Chalk Rocks and Chalk Marl by Invisible Organic Bodies, from the Observations of Dr. Ehrenberg, with an Appendix, Touching the Researches of M. Alcide D'Orbigny. print. by Richard and John E. Taylor, 1841.