Memorial of the Panama rail-road company to the Congress of the United States, 10th December, 1849.

Mode of access: Internet

Report of the board of directors to the stockholders.

Title varies slightly.Report year for 18 -1905 ends Dec. 31; for 1905/1906-1970, June 30.Mode of access: Internet.Reports for issued by the company under its earlier name: Panama Railroad Company

Evaluation of two fluridone formulations for the control of hydrilla in Gatun Lake, Panama Canal Zone : final report /

Cover title.Includes bibliographical references (page 29).Mode of access: Internet

The white amur as a biological control agent of aquatic weeds in the Panama Canal /

Cover title.Mode of access: Internet