Platon I 282; II [167], [169], [236].

Ploetz, Alfred I 300, 305; II [3], [11], [32], [106], [110], [112], [161], [167], [217], [232], [234], [237].

Poll II [177].

Polybios II [106].

Popenoe, P. I 303, 305; II [46], [233], [237].

Popert II [214], [237].

Punnet I 300.

Quessel II [152], [155].

Rath I 271; II [55].

Reiß I 232.