Allow me to put forward my views, as the person who put forward the original question.

I see a distinction between subject-specific research sources and research portals.

Here are a couple of examples of questions I consider to be about research sources: this (closed) thread about sources on the origins of communism, and this (accepted) question about on-line sources for maps. The latter was a popular question, by the way.

I think of a research portal as something like Google Search that Can lead me to research sources. Research portals could include:

Archive.org
Google Scholar
History Today magazine
http://www.asnc.cam.ac.uk/resources/research/index.htm
http://www.library.virginia.edu/research/

I'm keen to widen the net and include more globally focused Why not draw on the collective experience of users on this SE site?

Allow me to put forward my views, as the person who put forward the original question.

I see a distinction between subject-specific research sources and research portals.

Here are a couple of examples of questions I consider to be about research sources: this (closed) thread about sources on the origins of communism, and this (accepted) question about on-line sources for maps. The latter was a popular question, by the way.

I think of a research portal as something like Google Search that Can lead me to research sources. Research portals could include:

Archive.org
Google Scholar
History Today magazine
http://www.asnc.cam.ac.uk/resources/research/index.htm
http://www.library.virginia.edu/research/

I'm keen to widen the net and include more globally focused Why not draw on the collective experience of users on this SE site?