MULTIFREQUENCY OBSERVATIONS OF BL LACERTAE IN 1988 by Kawai, N, Matsuoka, M, Bregman, J, Aller, H, Hughes, P, Balbus, S, Balonek, T, Chambers, K, Clegg, R, Clements, S, Leacock, R, Smith, A, Miller, J, Hereld, M, Hoare, M, Hughes, V, Miley, G, Moriartyschieven, G, Matthews, K, Neugebauer, G, Ohashi, T, Roche, P, Thronson, H, Valtaoja, E, Terasranta, H