@book{73441,
	author = {Spencer , Herbrt and M. E. CAZELLES},
	title = {Principes De Biologie , },
	publisher = {FÉLIX ALCAN, ÉDITEUR ,},
	year = {1910 .},
	address = {Paris : },
	edition = {2ed.},
	url = {https://fll.law.cu.edu.eg/fulltext/bks/B10-10975.pdf}
}