Institution: | (1) Atlantic Research Associates Ltd., P.O. Box 220, B0 K 1 Y0 Wallace, NS, Canada;(2) Genu Products Canada Ltd., Sta, A., P. O. Box 8358, B3 K 5M1 Halifax, Canada;(3) Present address: Natural Sciences and Engineering Research Council, K1 A 0R6 Ottawa, Canada;(4) National Research Council, 1411 Oxford St., B3 H 3Z1 Halifax, Canada |