Usually a series (source) termination is adviced, but not always. When U design a small board, with short traces, and not to route any hi-speed signal to connectors, maybe you do not need any termination until 150-200MHz. There are working reference designs with 133MHz SDRAMs and without any termination.
Parallel (end) termination is rearly required, because it loads very strongly the logic outputs. 3,3V 60 Ohm load-> 55mA !!!
series termination not olways required, but not hurts. Rs=Z0-Rg (Rg=output imp.)
Added after 2 minutes:
striplines require a minimum of 6 layers! (routing: top, bott, inner2, inner3; planes: inner1, inner4)