The most recent MS Basic manual is available at BITSAVERS, but that one is for V5.
MS BASIC V5.2 can be loaded and run from CP/M and is included in all of the distributions available for the any RC2014.
The standard MS BASIC for RC2014 Mini is derived from the NASCOM version of MS BASIC and is v4.7.
Note the instructions relating to the file load and store have been removed (there's no file system available on a Mini or Classic).
Extra copy here in case of forgetful internet.
Information about the functions added to the standard MS BASIC to load Intel HEX files, to run an on-board assembler (Zen), and to read and program in binary (HEX) are in the RC2014 Github readme.
Cheers,
P.