Paper on Piperia (Orchidaceae)

[Adolf Ceska]

I am looking for the following paper on Piperia (Orchidaceae):

Hervouet, J.M., 1994. Le genre Piperiaeen Colombie britannique.
   Orchidophile, 25:116-9.

I would greatly appreciate any help in locating the journal or finding
J.M. Hervouet's address.

Many thanks and best regards,

Adolf Ceska

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