William Cruickshank (Portuguese Wikipedia)

Analysis of information sources in references of the Wikipedia article "William Cruickshank" in Portuguese language version.

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books.google.com

A Handbook to a Collection of the Minerals of the British Islands... by Frederick William Rudler publ. HMSO (1905) page 211(available digitized by Google)
Electricity by Robert M Ferguson, publ. Chambers (1873) page 169 (available digitized by Google).

Weeks, Mary Elvira (1932). «The discovery of the elements: X. The alkaline earth metals and magnesium and cadmium». Journal of Chemical Education. 9 (6): 1046–1057. doi:10.1021/ed009p1046
Partington, J.R. (1942). «The early history of strontium». Annals of Science. 5 (2). 157 páginas. doi:10.1080/00033794200201411