About: http://webisa.webdatacommons.org/137997215

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	This book is a practical guide to the two most popular data modes, RTTY and PSK31.This book is an expanded and fully updated 2nd edition of the popular RTTY and PSK31 for Radio Amateurs.
http://www.w3.org/ns/prov#wasQuotedFrom	rsgbshop.org