P.R. Pamphlet
Proportional Representation Society
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Proportional Representation Society 1922 P.R. Pamphlet no. 51
所蔵館1館
Proportional Representation Society 1920 P.R. Pamphlet no. 46
The Proportional Representative Society 1919 P.R. Pamphlet no. 42
by H. G. Chancellor and Aneurin Williams
The Proportional Representation Society 1917 P.R. Pamphlet no. 31
所蔵館2館
John H. Humphreys
Proportional Representation Society [19--] P.R. Pamphlet No. 83
