00342nam a2200121Ia 4500082001700000100002200017245003900039260004800078300002300126490006100149500000500210700000500215  a516bC182.PC  aCameron, Peter J.  aParallelisms of complete designsb  aCambridgebCambridge University Pressc1976  a144p. Index, Bibl.  aLondon Mathematical Society lecture notes seriesv no 23  a  a