public ScienceJournal(string name, string author, string subject, DateTime printDate, ISSN issn, Categories cat, string location) : base(name, author, subject, printDate, issn, location) { this.Category = cat; }
public Journal(string name, string author, string subject, DateTime printDate, ISSN issn, string location) : base(name, author, printDate, issn, location) { this.ISSN = issn; this.Subject = subject; }