Concept: Different ISBD standards were developed for different types of library materials.
Step 1: Match ISBD (PM).
ISBD (PM) refers to Printed Music and is associated with the year 1980.
\[
A \rightarrow III
\]
Step 2: Match ISBD (CR).
ISBD (CR) refers to Continuing Resources and is associated with the year 2002.
\[
B \rightarrow II
\]
Step 3: Match ISBD (ER).
ISBD (ER) refers to Electronic Resources and is associated with the year 1997.
\[
C \rightarrow IV
\]
Step 4: Match ISBD (NBM).
ISBD (NBM) refers to Non-Book Materials and is associated with the year 1977.
\[
D \rightarrow I
\]
Therefore, the correct matching is:
\[
A-III,\ B-II,\ C-IV,\ D-I
\]