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Szu, S C., S. Bystricky, M. Hinojosa-Ahumada, W. Egan, και J B. Robbins. Synthesis and Some Immunologic Properties of an O-acetyl Pectin [poly(1-->4)-alpha-D-GalpA]-protein Conjugate As a Vaccine for Typhoid Fever. 1994.

Szu, S C., et al. Synthesis and Some Immunologic Properties of an O-acetyl Pectin [poly(1-->4)-alpha-D-GalpA]-protein Conjugate As a Vaccine for Typhoid Fever. 1994.