How to know the butterflies : illustrated keys for determining to species all butterflies found in North America, north of Mexico, with notes on their distribution, habits, and larval food, and suggestions for collecting and studying them /
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| פורמט: | ספר |
| שפה: | English |
| יצא לאור: |
Dubuque, Iowa :
W. C. Brown Co,
[1961].
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| מהדורה: | 1st ed. |
| סדרה: | Pictured key nature series.
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| תיאור פיזי: | 262 p : illus ; 22 cm. |
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