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Copyright © 1 949 by ^"^^^ilAtunc Sctiu 



H. E. Jaques 



Library of Congress Catalog Card Number A50-2933 



ISBN 0-697-04807-1 (cloth) 

 ISBN 0-697-04806-3 (paper) 



THE PICTURED-KEY NATURE SERIES 

 How To Know The — 



AQUATIC PLANTS, Prescott, 1969 



BEETLES, Jaques, 1951 



BUTTERFLIES, Ehrlich, 1961 



CACTI, Dawson, 1963 



EASTERN LAND SNAILS, Burch, 1962 



ECONOMIC PLANTS, Jaques, 1948, 1958 



FALL FLOWERS, Cuthbert, 1948 



FRESHWATER ALGAE, Prescott, 1954, 1970 



FRESHWATER FISHES, Eddy, 1957, 1969 



GRASSES, Pohl, 1953, 1968 



GRASSHOPPERS, Heifer, 1963 



IMMATURE INSECTS, Chu, 1949 



INSECTS, Jaques, 1947 



LAND BIRDS, Jaques, 1947 



LICHENS, Hale, 1969 



LIVING THINGS, Jaques, 1946 



MAMMALS, Booth, 1949, 1970 



MARINE ISOPOD CRUSTACEANS, Schultz, 1969 



MOSSES AND LIVERWORTS, Conard, 1944, 1956 



PLANT FAMILIES, Jaques, 1948 



POLLEN AND SPORES, Kapp, 1969 



PROTOZOA, Jahn, 1949 



ROCKS AND MINERALS, Heifer, 1970 



SEAWEEDS, Dawson, 1956 



SPIDERS, Kaston, 1952 



SPRING FLOWERS, Cuthbert, 1943, 1949 



TAPEWORMS, Schmidt, 1970 



TREMATODES, Schell, 1970 



TREES, Jaques, 1946 



WATER BIRDS, Jaques-Ollivier, 1960 



WEEDS, Jaques, 1959 



WESTERN TREES, Baerg, 1955 



Printed in United States of America 



