On the existence of non-static plane symmetric space-times /

"July 30, 1958"

The signs of the times, or, The approach of the millennium : an address to the Tories, Whigs, Radicals, and chartists, churchmen, Catholics, dissenters, and infidels, to all producers of wealth, and non-producers, in Great Britain and Ireland /

Goldsmiths'-Kress no. 32484.

The slavery of our times,

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