Date of Stanford Medical School Commencement, 1979?

[mashfanficchick]

Sorry, I know, asking something insane again, but can anyone tell me how on EARTH I can find out what the date was of commencement ceremonies at Stanford University School of Medicine in 1979? I actually need the EXACT date; it's important to my storyline.

Things Tried:

• Googled various combinations of "graduation"; "commencement"; "Stanford Medical School"; "Stanford University School of Medicine"; "date"; "May"; and "1979"
• Checked the dates to make sure that Stanford University School of Medicine was already called that in 1979 (it had previously been called Cooper Medical School, but that changed in, I believe 1959--maybe even earlier--which would be 20 years before my story takes place).
• Searched various combinations of "graduation"; "commencement"; "May"; and "1979" using the search feature on the official Stanford University School of Medicine website.
  
• Read--both for interest and information--the treatise "Stanford University School of Medicine and the Predecessor Schools: An Historical Perspective"

Any suggestions for ways/places to search would be welcome, as would, in the unlikely event that someone has it, the actual answer to my question. Thanks in advance for any help anyone can give me.