Hi Bryan, I did a brief search at www.cinahl.com
This is a service you have to pay for (the right to search) but it is a very good deal and you get quite a bit of bang for your buck. I don't think the search format is that easy to use, but it was easy for your topic. You can also order articles from them directly, which is where they make their real money (ouch!).
Any how, here is a sample of what I found:
Drawing and administering injections: a review of the lit. Rodgers, MA, King, C. J ADV NURS 2000 Mar 31(3) 574-82
Safe injection techniques Workman B NURS STAND 1999 June 16-22, 13(39) 47-54
Clinical dos and don'ts: Administering a z-track injection. McConnell EA NURSING 1999 Jan, 29(1) 26 [only 1 page]
research in brief. Improvements in nursing practice trhough a study comparing IM depot ijection admin tech (MacGabhann L) J PSYCHIATRIC MENTAL HEALTH NURS 1997 Dec 4(6) 436-7
Back to the basics: administering IM injections the right way Beyea SC, Nicholl LH AM J NURS 1996 Jan 96(1) 34-5
Admin of meds via the IM route [a lit review with research based protocol--I assume this article is the basis for the above article] Beyea SC and Nicholl LH APPL NURS RES 1995 Feb 8(1) 23-33
Cannot guarantee I don't have typos here, but I did the best I could.