## Volume 4 (1991)

- Sharon G. Boswell
- L.H. Clark, R.C. Entringer, J.E. McCanna and L.A. SzĂ©kely
- D.R. Stinson and L. Zhu
- Marston Conder
- Random walks in large finite groups, pp.49–57

- E. Dawson, H. Gustafson and N. Davies
- Black box analysis of stream ciphers, pp.59–70

- M.A. Forbes, J.N. Holt, P.J. Kilby and A.M. Watts
- Jennifer Seberry
- Jennifer Seberry and Xian-Mo Zhang
- James Abello, Michael R. Fellows and John C. Stillwell
- Joan Cooper, Diane Donovan and Jennifer Seberry
- Latin squares and critical sets of minimal size, pp.113–120

- D.R. Shier and M.H. McIlwain
- Charles J. Colbourn and Alexander Rosa
- C.C. Lindner, E. Mendelsohn and C.A. Rodger
- L. Caccetta and Purwanto
- Qui-rong Wu
- A note on extending $t$-designs, pp.229–235

- Cheryl E. Praeger
- R.G. Stanton
- The geometric points of coverings, pp.253–260

- Heiko Harborth and Hartmut Weiss
- Minimum sets of partial polyominoes, pp.261–268

- Gerhard Behrendt
- Some sharply transitive partially ordered sets, pp.269–275

- David G. Glynn
- M.E. Morley