add srfi links

collects/scribblings/reference/pairs.scrbl

@@ -696,6 +696,7 @@ Like @racket[assoc], but finds an element using the predicate
 @; ----------------------------------------
 @section{Additional List Functions and Synonyms}
 
+@margin-note{More list functions are defined in @racketmodname[srfi/1].}
 @note-lib[racket/list]
 @(define list-eval (make-base-eval))
 @(interaction-eval #:eval list-eval

collects/scribblings/reference/strings.scrbl

@@ -369,6 +369,7 @@ allocated string).}
 @; ----------------------------------------
 @section{Additional String Functions}
 
+@margin-note{More string functions are defined in @racketmodname[srfi/13].}
 @note-lib[racket/string]
 @(define string-eval (make-base-eval))
 @(interaction-eval #:eval string-eval (require racket/string racket/list))

collects/scribblings/reference/time.scrbl

@@ -159,6 +159,7 @@ result is the result of @racket[expr].}
 
 @section[#:tag "date-string"]{Date Utilities}
 
+@margin-note{More date and time functions are defined in @racketmodname[srfi/19].}
 @note-lib-only[racket/date]
 
 @defproc[(current-date) date*?]{