HUBER, Peter J. Robust Estimation of a Location Parameter.
Baltimore: Institute of Mathematical Statistics, 1964. First edition.

"Huber's first paper on robust statistics is outstanding in several respects. It conatins the first encompassing mathematical definitions of the 'approximate validity of a parametric model' and thus became the founding paper of the 'stability theory of statistical procedures' that by a historical accident was called 'robust statistics'. ..." (Kotz & Johnson: Breakthroughs in Statistics, Vol. II, pp. 479).

In: The Annals of Mathematical Statistics, Volume 35, Number 1, pp. 73-101. The complete issue offered in original printed wrappers: spine strip with some writing in red ink, otherwise fine.