FIVE COMPREHENSIVE DRUG REHABILITATION PROGRAMS ARE INCLUDED IN THE STUDY. TREATMENT STAFF MEMBERS WERE QUESTIONED ABOUT THE QUALITY AND QUANTITY OF THEIR CONTACNTS WITH STAFF OF SELECTED COMMUNITY AGENCIES. DATA ON REFERRAL SOURCES AND PROGRAM PARTICIPATION WERE COLLECTED FOR ALL 288 CLIENTS ENTERING THE PROGRAMS OVER A 4-MONTH PERIOD. THE ANALYSIS DISTINQUISHES BETWEEN DIRECT CONTACTS AND INDIRECT NETWORK LINKAGES. DIRECT CONTACT IS POSITIVELY AND SIGNIFICANTLY ASSOCIATED WITH SECURING REFERRALS AND MAINTAINING CLIENTS. INDIRECT LINKAGES ARE STRONGLY AND INVERSELY ASSOCIATED WITH SECURING REFERRALS AND ARE NOT ASSOCIATED WITH MAINTAINING CLIENTS. THE FINDINGS IMPLY THAT IF A DRUG PROGRAM STAFF MEMBER INVESTS IN A RELATIONSHIP WITH A COMMUNITY AGENCY STAFF MEMBER BY USING INTERPERSONAL TECHNIQUES TO FULFILL ROLE BEHAVIOR NEEDS, THEN THE COMMUNITY AGENCY STAFF MEMBER WILL RECIPROCATE BY REFERRING APPROPRIATE CLIENTS TO THE DRUG PROGRAM AND BY HELPING THE CLIENTS TO MAKE BETTER USE OF THE PROGRAM. THE END RESULT OF THIS COLLABORATIVE BEHAVIOR IS ENHANCED SERVICE TO CLIENTS. SUPPORTING DATA AND DOCUMENTATION, COPIES OF STUDY INSTRUMENTS, AND A SELECTED BIBLIOGRAPHY ARE PROVIDED. (AUTHOR ABSTRACT MODIFIED--LKM)