TH.Memorandum no. RAV/2/74.6.November 1974
Aggregation problems : the question of scale: micro-macro, urban-regional : paper presented at P.T.R.C. summer annual meeting, 8-12 July 1974, University of Warwick
Aggregation problems : the question of scale: micro-macro, urban-regional : paper presented at P.T.R.C. summer annual meeting, 8-12 July 1974, University of Warwick / P. Drewe