00326nam a2200109 a 4500008004100000050002200041100001800063245005700081260003900138300003000177350000900207120416s1974    ||||||||||||||||| ||    u  aHT 178.Z22L88 Col  aCollins, John14aThe expansion and improvement of physical settlement  aLusakabD.P.U. Research Teamc1974  ain various pagings : ill.  a0.00