What sources are used? Does it have a standard obituary lead or an alternative? What is the news value? How does the obit differ from a resume?
The obituary attributes information to Cal's son, Christopher, and Cal's 1986 oral history for the Time Inc. A Life editorial is a source,
The lead is a little different from a standard obit lead. It opens by telling the reader a few of Cal's most notable accomplishments. The reader isn't told he has died until the second paragraph.
The news values are prominence and impact.
The obit differs from a resume because it doesn't just tell what Cal has accomplished, but it also goes into the effects of his accomplishments, more personal details then what you would find in a resume, and it contains quotes.