 sources associated with massive star-forming regions; W0(OH), Mon R0, S 000, W 00A, IRAS 00000$-$0000, G 00.00$+$0.00, G 00.00$-$0.00, IRAS 00000$+$0000, W 00, OH 00.0$-$0.0, ON 0, Cep A and NGC 0000