John F. Helmer

发表

Editorial: Inhaling the Spore

John F. Helmer, 1998 .

ART & ARCHITECTURE THESAURUS. Toni Petersen

John F. Helmer, 1991 .

Editorial: I Inhaled

John F. Helmer, 2017 .

Orbis courier service: The resurrection of a collaborative success

John F. Helmer, 1998 .

Consortial collaboration : a perspective from the U.S.

John F. Helmer, 2004 .

Progress Along the Road to Statewide Database Licensing

John F. Helmer, 2004 .