Jones, Douglas A. H.H. Robertson; a unique international company. [electronic resource] . — New York, : Newcomen Society in North America,, 1966.. — 24 p. — (Newcomen address,) 1965. LCCN: 66017075 Subjects--Corporate Names: H.H. Robertson Company. LC Class. No.: HD9503.R6 / J6 Dewey Class. No.: 338.769