00438nam a2200181Ia 4500001000700000003000500007008004100012010001100053020001800064040000900082082001400091100002200105245004100127260003100168300003200199503001000231650001500241Z_2545CHAP220113s1977 xx 000 0 und d a165604 a84-282-0405-5 cCHAP a574.5 M37 aMargalef, Ramón aEcología /cpor Ramón Margalef aBarcelona :bOmega,c1977 a951 p. : bilus. ; gráfs. a49017 aEcología