An Aide to Brandt Is Arrested as a Spy
Guenter Guillaume, pol assistant in W Ger Chancellor Brandt's office, is arrested on suspicion of being spy for E Ger; Chief Fed Prosecutor Ludwig Martin says that Guillaume has made statement admitting being officer in E Ger Army and being in collaboration with E Ger Min of State Security; Guillaume is arrested along with his wife Christel and several others; arrests apparently uncover existence of Communist spy ring at center of W Ger Govt; Soc Dem party sources say security officials, with Brandt's approval, have been 'dealing out' fake secret information to Guillaume; Guillaume illus (M)