Postage stamps and postal history of the Niassa Company (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Postage stamps and postal history of the Niassa Company" in English language version.

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nyassastamps.co.uk

Claude Emerson – Portu-Info (International Society for Portuguese Philately) Volume 22, No. 93, January 1987 Reprinted here.
"The 1901 Nyassa Company stamp issue". Nyassa Stamps. 2012. Retrieved 12 July 2012.
Betram Poole, Mekeel's Weekly Stamp News 25 February 1911 Volume XXV, Number 8, Whole Issue Number 1052. Reprinted here.
"Nyassa Stamps". www.nyassastamps.co.uk. Retrieved 7 May 2010.
Claude Emerson, Portu-Info (International Society for Portuguese Philately) Volume 23, No. 90, October 1988. Reprinted here.
John K. Cross – Portu-Info (International Society for Portuguese Philately) Volume 22, No. 85, July 1987 Reprinted here.