THIS VISITORS' BOOK IS OPEN TO THE PARTICIPATION OF CITIZENS FROM AROUND THE WORLD. YOU MAY WRITE YOUR MESSAGE ON BARCELONA FIELD STUDIES CENTRE OR ON THIS WEBSITE WITH NO LIMITATIONS EXCEPT THE USUAL ONES OF COURTESY AND DEMOCRATIC RESPECT. THIS MEANS THAT MESSAGES THAT CONTAIN EXPRESSIONS THAT ARE OFFENSIVE TO HUMAN DIGNITY, THAT ARE RACIST OR XENOPHOBIC, THAT ADVOCATE OR INDUCE VIOLENCE OR ILLEGAL ACTIVITIES, OR THAT VIOLATE THE PRINCIPLES OF DEMOCRATIC HARMONY WILL BE DELETED.