00495pamaa2200181 4500 0000020786 20060626090000.0 0140122915 649.144 BRY 1992 HQ777.35 BRY 1992 BRYAN Twins, triplets, and more : their nature, development and care Elizabeth Bryan. London: Penguin Books, 1992. ix, 138p.; 20cm. Twins Triplets Multiple birth Child rearing