Ar goll /
Cowley, Joy.
Webb, Philip,1952-
Curriculum Council for Wales.
Walton-on-Thames : Nelson,
1990, 1982.
Arg Saesneg gwreiddiol = Original English ed: E. J. Arnold, 1982
Teitl clawr = Cover title
Addasiad Cymraeg = Welsh adaptation: Cyngor Cwricwlwm Cymru
Welsh language