G.L. Schumann, J.D. MacDonald, ,Turf Grass Diseases: diagnosis and management CD ROM. ISBN 0 89054 219 8 (Single user); 0 89054 220 1 (Local network). (1997) APS Press,St Paul, USA Price $US 310 ($US 295 in USA) — single user: $US 410 ($US 395 in USA) -local network, defined as resident on one server only serving up to 25 users: if different, enquire of publisher..