LEADER 00000nam 2200205 a 4500 001 0469630 003 UkHlHU 007 t 008 002311 1 1971 000 eng 040 UkHlHU 050 4 |fq|aTC 764 V8 100 1 Vogel, Robert M. 245 10 Roebling's Delaware and Hudson canal aqueducts. 260 Washington, D.C. :|bSmithsonian Institute Press,|c1971. 300 45p. 440 0 Smithsonian studies in history and technology ;|vno. 10 600 14 Roebling, John A. 650 0 Canal aqueducts. 710 2 Smithsonian Institution. 946 020 absent -- ISBN check required
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