'Many authors will be happy to email you a copy of their paper'. Posting the requested copy was the rule in the '60s and earlier. This could lead to impressive stamp collections. I wonder if Dr. Lowry took up philately. Most cited paper of all time - Protein Measurement with the Folin Phenol Reagent (Lowry, O. H., Rosebrough, N. J., Farr, A. L., and Randall, R. J. (1951) J. Biol. Chem.193, 265–275)
