Practical allergyEtan Milgrom, Richard Usatine, Ricardo Tan, Sheldon Spector · First published 2003Open the Tome
Anticholinergic Agents in the Upper and Lower AirwaysSheldon Spector · First published 1999Open the Tome
Anticholinergic Agents in Upper and Lower AirwaysSheldon L. Spector · First published 1999Open the Tome
Provocation Testing in Clinical Practice (Clinical Allergy and Immunology, Vol 5)Sheldon Spector · First published 1994Open the Tome
Provocative challenge proceduresSheldon L. Spector · First published 1983 · Latest edition 1989Open the Tome