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Commemorating the Large Steam Dipper Dredges of the Panama Canal | Analytt | q386(05) N
Thompson, John / I: Nautical Research Journal. - Vol.43, No.2, 1998 - Silver Spring, 1998. - s.92-103 | Thompson, John | 1998 |
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The Panama Canal - Past, Present and Future | Analytt | q629.123.2(091(05) St
Shaw, L. James / I: Steamboat Bill. - Vol.LVI, No.231, 1999 - Providence, R.I., 1999. - s.205-213 | Shaw, L. James | 1999 |