| 21. | Construction workers find them now and then during excavation work.
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| 22. | In 2008-11 he undertook survey and excavation work in the Kherlen Valley in Mongolia.
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| 23. | The excavation work proceeded in three shifts per day, involving blasting through hard rock.
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| 24. | During excavation works in 1993 for the adjoining presidential castle.
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| 25. | Excavation works continue at a daily rate of with a total of 150 personnel.
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| 26. | Groundbreaking occurred in August 1963, and major excavation work was complete by May 1964.
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| 27. | These were examined in 1935, 1939 and 1982 when excavation work for wiring began.
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| 28. | Excavation work began in May 2003, four months after the Hraneks'daughter, Clara, was born.
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| 29. | Excavation work at Chichen Itza did not begin until the 1923 24 field season.
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| 30. | During the excavation work of the 1870s, Bernard documents the discovery of many artefacts.
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