On graceful, residually graceful and properly graceful digraphs

Manylion Llyfryddiaeth
Prif Awdur:	Reyos, Diana A. (Awdur)
Awduron Eraill:	Tan, Evelyn L. (thesis adviser.)
Fformat:	Traethawd Ymchwil
Iaith:	Saesneg
Pynciau:	Directed graphs.