NewHamQTH creates a new HamQTH instance with the given username and password.

NewQRZ creates a new QRZ instance with the given username and password.

QRZTimeFormat describes the time format used by qrz.com.

HamQTH represents a connection to hamqth.com with a certain user account.

Info contains the information from a callbook service about a callsign.

QRZ represents a connection to qrz.com with a certain user account.

Callbook defines the Lookup functionality in a callbook.

Factory is a function that creates a new callbook instance from username and password.