Amsterdam (J.H. de Bussy), 1930 (1st ed.). 216 pp. + 174 ills. in b/w and 6 orig. etchings by Poortenaar (and signed with pencil), 8 mounted paper-samples, 4to, cloth wqith foxing along edges and bookplate on inside of front cover.
Exhib. cat. Munich, Staatliche Graphische Sammlung in der Pinakothek der moderne [publ. Deutscher Kunstverlag], 2013. 288 pp., nums. ills. in col. and b/w. 4to, boards