€ 17,00
42 p., folding map, 11 plates. Half cloth 22 cm (Trade edition of the dissertation of 1959)
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Groningen, Den Haag, Wolters, 1928.
Lund, Ohlsson, 1941.
México, Univ. Nac. Atónoma de México, 1996.
Oxford, Clarendon Press, 1933.