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Crushing of Vereeniging coal to one and a half inches top size

Van der Walt, PJ (1952)
Tests carried out on the drewboy washer during the period February to August 1958

Van der Walt, PJ (1958)
Proposed programme of work for the coal preparation pilot plant February - July 1958

Van der Walt, PJ (1958)
A study of the operation of the cyclone washer and its application to Witbank fine coal

Van der Walt, PJ (1950)
Research on coal cleaning in progress in Britian and on the continent

Van der Walt, PJ (1951)
A preliminary study of the technical and economic aspects of washing a certain Witbank duff in a cyclone in order to recover the coking fraction

Van der Walt, PJ (1952)
Performance of Jeffery single roll crusher installed at Van Dyksdrift colliery

Van der Walt, PJ (1952)
Handling and storage of coal

Van der Walt, PJ (1956)
Notes on the institutes coal preparation pilot plant

Van der Walt, PJ (1956)
Sizing of coal (Witwatersrand University Coal Preparation course 3rd Year Coal Mining Students)

Van der Walt, PJ (1956)

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- Van der Walt, PJ (11)
- Van Eck, B (1)
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- 1956 (4)
- 1952 (3)
- 1958 (2)
- 1950 (1)
- 1951 (1)
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