Nigerian Government Scholarship - Dr E. M. Essien 1965, July-August 1965 Box 10 Unit ID: 89 Date: July-August 1965
O/S Visitor-A/Prof L. Solvell 1970, September 1969-March 1970 Box 15 Unit ID: 145 Date: September 1969-March 1970
O/S visitor-Dr A. Giedion 1969, August-September 1969 Box 13 Unit ID: 125 Date: August-September 1969
O/S Visitor-Dr A. Glorig 1968, August 1967-February 1968 Box 12 Unit ID: 109 Date: August 1967-February 1968
O/S Visitor-Dr C.J. Smyth 1969, August 1968-March 1969 Box 14 Unit ID: 132 Date: August 1968-March 1969