= Mostly drawings of Indian, Egyptian or Arabic architecture, ornaments and/ or people. Provenance: the collection A.M. van den Broek.
= Rome, Berlijn, Leningrad, Milaan, Granada, Zürich, Parijs, Londen, Sevilla and New York.
Idem. Claudius is dood. Utr., (the artist), 1997, (5)p., 6 (3x full-p.) lithographs by J. HERMKENS (1x signed, dated "1977" and numb. "8/55" in pencil by the artist), printed in 55 numb. copies, signed and numb. in pencil by the artist in the colophon, orig. wr. w. col. lithogr. frontcover signed in pencil by J. HERMKENS, orig. slipcase, large 4to.
= Cat. Haags Gemeentemuseum 1970, no.120.
AND 6 other etchings (and aquatint) by the same, i.a. Wrakhout (1976) and Zelfportret (1975).